diff --git a/common/actions/deterministicWallets.js b/common/actions/deterministicWallets.js
index c6f277f2..ee30d31c 100644
--- a/common/actions/deterministicWallets.js
+++ b/common/actions/deterministicWallets.js
@@ -14,18 +14,20 @@ export type DeterministicWalletData = {
 export type GetDeterministicWalletsAction = {
   type: 'DW_GET_WALLETS',
   payload: {
+    seed: ?string,
     dPath: string,
-    publicKey: string,
-    chainCode: string,
+    publicKey: ?string,
+    chainCode: ?string,
     limit: number,
     offset: number
   }
 };
 
 export type GetDeterministicWalletsArgs = {
+  seed: ?string,
   dPath: string,
-  publicKey: string,
-  chainCode: string,
+  publicKey: ?string,
+  chainCode: ?string,
   limit?: number,
   offset?: number
 };
@@ -33,10 +35,11 @@ export type GetDeterministicWalletsArgs = {
 export function getDeterministicWallets(
   args: GetDeterministicWalletsArgs
 ): GetDeterministicWalletsAction {
-  const { dPath, publicKey, chainCode, limit, offset } = args;
+  const { seed, dPath, publicKey, chainCode, limit, offset } = args;
   return {
     type: 'DW_GET_WALLETS',
     payload: {
+      seed,
       dPath,
       publicKey,
       chainCode,
diff --git a/common/actions/wallet.js b/common/actions/wallet.js
index 39a9b6b9..aafe9131 100644
--- a/common/actions/wallet.js
+++ b/common/actions/wallet.js
@@ -43,6 +43,28 @@ export function unlockKeystore(
   };
 }
 
+/*** Unlock Mnemonic ***/
+export type MnemonicUnlockParams = {
+  phrase: string,
+  pass: string,
+  path: string,
+  address: string
+};
+
+export type UnlockMnemonicAction = {
+  type: 'WALLET_UNLOCK_MNEMONIC',
+  payload: MnemonicUnlockParams
+};
+
+export function unlockMnemonic(
+  value: MnemonicUnlockParams
+): UnlockMnemonicAction {
+  return {
+    type: 'WALLET_UNLOCK_MNEMONIC',
+    payload: value
+  };
+}
+
 /*** Set Wallet ***/
 export type SetWalletAction = {
   type: 'WALLET_SET',
diff --git a/common/components/WalletDecrypt/DeterministicWalletsModal.jsx b/common/components/WalletDecrypt/DeterministicWalletsModal.jsx
index 3fd7b6eb..032441ff 100644
--- a/common/components/WalletDecrypt/DeterministicWalletsModal.jsx
+++ b/common/components/WalletDecrypt/DeterministicWalletsModal.jsx
@@ -36,15 +36,17 @@ type Props = {
   walletType: ?string,
   dPath: string,
   dPaths: { label: string, value: string }[],
-  publicKey: string,
-  chainCode: string,
+  publicKey: ?string,
+  chainCode: ?string,
+  seed: ?string,
   onCancel: () => void,
-  onConfirmAddress: string => void,
+  onConfirmAddress: (string, number) => void,
   onPathChange: string => void
 };
 
 type State = {
   selectedAddress: string,
+  selectedAddrIndex: number,
   isCustomPath: boolean,
   customPath: string,
   page: number
@@ -54,6 +56,7 @@ class DeterministicWalletsModal extends React.Component {
   props: Props;
   state: State = {
     selectedAddress: '',
+    selectedAddrIndex: 0,
     isCustomPath: false,
     customPath: '',
     page: 0
@@ -64,20 +67,23 @@ class DeterministicWalletsModal extends React.Component {
   }
 
   componentWillReceiveProps(nextProps) {
-    const { publicKey, chainCode } = this.props;
+    const { publicKey, chainCode, seed, dPath } = this.props;
     if (
       nextProps.publicKey !== publicKey ||
-      nextProps.chainCode !== chainCode
+      nextProps.chainCode !== chainCode ||
+      nextProps.dPath !== dPath ||
+      nextProps.seed !== seed
     ) {
       this._getAddresses(nextProps);
     }
   }
 
   _getAddresses(props: Props = this.props) {
-    const { dPath, publicKey, chainCode } = props;
+    const { dPath, publicKey, chainCode, seed } = props;
 
-    if (dPath && publicKey && chainCode && isValidPath(dPath)) {
+    if (dPath && ((publicKey && chainCode) || seed) && isValidPath(dPath)) {
       this.props.getDeterministicWallets({
+        seed,
         dPath,
         publicKey,
         chainCode,
@@ -116,12 +122,15 @@ class DeterministicWalletsModal extends React.Component {
 
   _handleConfirmAddress = () => {
     if (this.state.selectedAddress) {
-      this.props.onConfirmAddress(this.state.selectedAddress);
+      this.props.onConfirmAddress(
+        this.state.selectedAddress,
+        this.state.selectedAddrIndex
+      );
     }
   };
 
-  _selectAddress(selectedAddress) {
-    this.setState({ selectedAddress });
+  _selectAddress(selectedAddress, selectedAddrIndex) {
+    this.setState({ selectedAddress, selectedAddrIndex });
   }
 
   _nextPage = () => {
@@ -148,7 +157,7 @@ class DeterministicWalletsModal extends React.Component {
     return (
       <tr
         key={wallet.address}
-        onClick={this._selectAddress.bind(this, wallet.address)}
+        onClick={this._selectAddress.bind(this, wallet.address, wallet.index)}
       >
         <td>
           {wallet.index + 1}
diff --git a/common/components/WalletDecrypt/Mnemonic.jsx b/common/components/WalletDecrypt/Mnemonic.jsx
index 2c6bb22a..98cc58ce 100644
--- a/common/components/WalletDecrypt/Mnemonic.jsx
+++ b/common/components/WalletDecrypt/Mnemonic.jsx
@@ -1,27 +1,129 @@
 import React, { Component } from 'react';
-import translate from 'translations';
+import translate, { translateRaw } from 'translations';
+import { validateMnemonic, mnemonicToSeed } from 'bip39';
+
+import DeterministicWalletsModal from './DeterministicWalletsModal';
+
+import DPATHS from 'config/dpaths.js';
+const DEFAULT_PATH = DPATHS.MNEMONIC[0].value;
+
+type State = {
+  phrase: string,
+  pass: string,
+  seed: string,
+  dPath: string
+};
 
 export default class MnemonicDecrypt extends Component {
+  props: { onUnlock: any => void };
+  state: State = {
+    phrase: '',
+    pass: '',
+    seed: '',
+    dPath: DEFAULT_PATH
+  };
+
   render() {
+    const { phrase, seed, dPath, pass } = this.state;
+    const isValidMnemonic = validateMnemonic(phrase);
+
     return (
       <section className="col-md-4 col-sm-6">
-        <div id="selectedUploadKey">
-          <h4>{translate('ADD_Radio_2_alt')}</h4>
-
+        <div id="selectedTypeKey">
+          <h4>
+            {translate('ADD_Radio_5')}
+          </h4>
           <div className="form-group">
-            <input type="file" id="fselector" />
-
-            <a
-              className="btn-file marg-v-sm"
-              id="aria1"
-              tabIndex="0"
-              role="button"
-            >
-              {translate('ADD_Radio_2_short')}
-            </a>
+            <textarea
+              id="aria-private-key"
+              className={`form-control ${isValidMnemonic
+                ? 'is-valid'
+                : 'is-invalid'}`}
+              value={phrase}
+              onChange={this.onMnemonicChange}
+              placeholder={translateRaw('x_Mnemonic')}
+              rows="4"
+            />
           </div>
+          <div className="form-group">
+            <p>Password (optional):</p>
+            <input
+              className="form-control"
+              value={pass}
+              onChange={this.onPasswordChange}
+              placeholder={translateRaw('x_Password')}
+              type="password"
+            />
+          </div>
+          {isValidMnemonic &&
+            <div className="form-group">
+              <button
+                style={{ width: '100%' }}
+                onClick={this.onDWModalOpen}
+                className="btn btn-primary btn-lg"
+              >
+                {translate('Choose Address')}
+              </button>
+            </div>}
         </div>
+
+        <DeterministicWalletsModal
+          isOpen={!!seed}
+          seed={seed}
+          dPath={dPath}
+          dPaths={DPATHS.MNEMONIC}
+          onCancel={this._handleCancel}
+          onConfirmAddress={this._handleUnlock}
+          onPathChange={this._handlePathChange}
+          walletType={translateRaw('x_Mnemonic')}
+        />
       </section>
     );
   }
+
+  onPasswordChange = (e: SyntheticInputEvent) => {
+    this.setState({ pass: e.target.value });
+  };
+
+  onMnemonicChange = (e: SyntheticInputEvent) => {
+    this.setState({ phrase: e.target.value });
+  };
+
+  onDWModalOpen = (e: SyntheticInputEvent) => {
+    const { phrase, pass } = this.state;
+
+    if (!validateMnemonic(phrase)) return;
+
+    try {
+      let seed = mnemonicToSeed(phrase.trim(), pass).toString('hex');
+      this.setState({ seed });
+    } catch (err) {
+      console.log(err);
+    }
+  };
+
+  _handleCancel = () => {
+    this.setState({ seed: '' });
+  };
+
+  _handlePathChange = (dPath: string) => {
+    this.setState({ dPath });
+  };
+
+  _handleUnlock = (address, index) => {
+    const { phrase, pass, dPath } = this.state;
+
+    this.props.onUnlock({
+      path: `${dPath}/${index}`,
+      pass,
+      phrase,
+      address
+    });
+
+    this.setState({
+      seed: '',
+      pass: '',
+      phrase: ''
+    });
+  };
 }
diff --git a/common/components/WalletDecrypt/Trezor.jsx b/common/components/WalletDecrypt/Trezor.jsx
index df0d111f..dba45ddc 100644
--- a/common/components/WalletDecrypt/Trezor.jsx
+++ b/common/components/WalletDecrypt/Trezor.jsx
@@ -5,7 +5,7 @@ import translate from 'translations';
 import TrezorConnect from 'vendor/trezor-connect';
 import DeterministicWalletsModal from './DeterministicWalletsModal';
 import TrezorWallet from 'libs/wallet/trezor';
-import DPATHS from 'config/dpaths.json';
+import DPATHS from 'config/dpaths.js';
 const DEFAULT_PATH = DPATHS.TREZOR[0].value;
 
 type State = {
@@ -65,8 +65,8 @@ export default class TrezorDecrypt extends Component {
     });
   };
 
-  _handleUnlock = (address: string) => {
-    this.props.onUnlock(new TrezorWallet(address, this.state.dPath));
+  _handleUnlock = (address: string, index: number) => {
+    this.props.onUnlock(new TrezorWallet(address, this.state.dPath, index));
   };
 
   render() {
diff --git a/common/components/WalletDecrypt/index.jsx b/common/components/WalletDecrypt/index.jsx
index b3919813..4935b81f 100644
--- a/common/components/WalletDecrypt/index.jsx
+++ b/common/components/WalletDecrypt/index.jsx
@@ -9,7 +9,12 @@ import LedgerNanoSDecrypt from './LedgerNano';
 import TrezorDecrypt from './Trezor';
 import ViewOnlyDecrypt from './ViewOnly';
 import map from 'lodash/map';
-import { unlockPrivateKey, unlockKeystore, setWallet } from 'actions/wallet';
+import {
+  unlockPrivateKey,
+  unlockKeystore,
+  unlockMnemonic,
+  setWallet
+} from 'actions/wallet';
 import { connect } from 'react-redux';
 import isEmpty from 'lodash/isEmpty';
 
@@ -35,7 +40,8 @@ const WALLETS = {
   'mnemonic-phrase': {
     lid: 'x_Mnemonic',
     component: MnemonicDecrypt,
-    disabled: true
+    initialParams: {},
+    unlock: unlockMnemonic
   },
   'ledger-nano-s': {
     lid: 'x_Ledger',
diff --git a/common/config/dpaths.js b/common/config/dpaths.js
new file mode 100644
index 00000000..b73ba329
--- /dev/null
+++ b/common/config/dpaths.js
@@ -0,0 +1,50 @@
+const ETH_DEFAULT = {
+  label: 'Default (ETH)',
+  value: "m/44'/60'/0'/0"
+};
+
+const ETH_TREZOR = {
+  label: 'TREZOR (ETH)',
+  value: "m/44'/60'/0'/0"
+};
+
+const ETH_LEDGER = {
+  label: 'Ledger (ETH)',
+  value: "m/44'/60'/0'"
+};
+
+const ETC_LEDGER = {
+  label: 'Ledger (ETC)',
+  value: "m/44'/60'/160720'/0'"
+};
+
+const ETC_TREZOR = {
+  label: 'TREZOR (ETC)',
+  value: "m/44'/61'/0'/0"
+};
+
+const TESTNET = {
+  label: 'Testnet',
+  value: "m/44'/1'/0'/0"
+};
+
+const EXPANSE = {
+  label: 'Expanse',
+  value: "m/44'/40'/0'/0"
+};
+
+const TREZOR = [ETH_TREZOR, ETC_TREZOR, TESTNET];
+
+const MNEMONIC = [
+  ETH_DEFAULT,
+  ETH_LEDGER,
+  ETC_LEDGER,
+  ETC_TREZOR,
+  TESTNET,
+  EXPANSE
+];
+
+export default {
+  TREZOR,
+  MNEMONIC
+};
diff --git a/common/config/dpaths.json b/common/config/dpaths.json
deleted file mode 100644
index 10460eb3..00000000
--- a/common/config/dpaths.json
+++ /dev/null
@@ -1,16 +0,0 @@
-{
-  "TREZOR": [
-    {
-      "label": "TREZOR (ETH)",
-      "value": "m/44'/60'/0'/0"
-    },
-    {
-      "label": "TREZOR (ETC)",
-      "value": "m/44'/61'/0'/0"
-    },
-    {
-      "label": "Testnet",
-      "value": "m/44'/1'/0'/0"
-    }
-  ]
-}
diff --git a/common/libs/decrypt.js b/common/libs/decrypt.js
index 7e60f7e9..d70106c1 100644
--- a/common/libs/decrypt.js
+++ b/common/libs/decrypt.js
@@ -1,6 +1,11 @@
 //@flow
 
 import { createHash, createDecipheriv } from 'crypto';
+import { validateMnemonic, mnemonicToSeed } from 'bip39';
+import { fromMasterSeed } from 'hdkey';
+import { stripHexPrefixAndLower } from 'libs/values';
+
+import { privateToAddress } from 'ethereumjs-util';
 
 //adapted from https://github.com/kvhnuke/etherwallet/blob/de536ffebb4f2d1af892a32697e89d1a0d906b01/app/scripts/myetherwallet.js#L230
 export function decryptPrivKey(encprivkey: string, password: string): Buffer {
@@ -66,3 +71,28 @@ export function evp_kdf(data: Buffer, salt: Buffer, opts: Object) {
 export function decipherBuffer(decipher: Object, data: Buffer): Buffer {
   return Buffer.concat([decipher.update(data), decipher.final()]);
 }
+
+export function decryptMnemonicToPrivKey(
+  phrase: string,
+  pass: string,
+  path: string,
+  address: string
+): Buffer {
+  phrase = phrase.trim();
+  address = stripHexPrefixAndLower(address);
+
+  if (!validateMnemonic(phrase)) {
+    throw new Error('Invalid mnemonic');
+  }
+
+  const seed = mnemonicToSeed(phrase, pass);
+  const derived = fromMasterSeed(seed).derive(path);
+  const dPrivKey = derived.privateKey;
+  const dAddress = privateToAddress(dPrivKey).toString('hex');
+
+  if (dAddress !== address) {
+    throw new Error(`Derived ${dAddress}, expected ${address}`);
+  }
+
+  return dPrivKey;
+}
diff --git a/common/libs/transaction.js b/common/libs/transaction.js
index ed47705f..1d4c7b2a 100644
--- a/common/libs/transaction.js
+++ b/common/libs/transaction.js
@@ -4,7 +4,7 @@ import translate from 'translations';
 import { padToEven, addHexPrefix, toChecksumAddress } from 'ethereumjs-util';
 import { isValidETHAddress } from 'libs/validators';
 import ERC20 from 'libs/erc20';
-import { stripHex, valueToHex } from 'libs/values';
+import { stripHexPrefixAndLower, valueToHex } from 'libs/values';
 import { Wei, Ether, toTokenUnit } from 'libs/units';
 import { RPCNode } from 'libs/nodes';
 import { TransactionWithoutGas } from 'libs/messages';
@@ -132,12 +132,12 @@ export async function generateCompleteTransactionFromRawTransaction(
   }
   // Taken from v3's `sanitizeHex`, ensures that the value is a %2 === 0
   // prefix'd hex value.
-  const cleanHex = hex => addHexPrefix(padToEven(stripHex(hex)));
+  const cleanHex = hex => addHexPrefix(padToEven(stripHexPrefixAndLower(hex)));
   const cleanedRawTx = {
     nonce: cleanHex(nonce),
     gasPrice: cleanHex(gasPrice.toString(16)),
     gasLimit: cleanHex(gasLimit.toString(16)),
-    to: cleanHex(to),
+    to: toChecksumAddress(cleanHex(to)),
     value: token ? '0x00' : cleanHex(value.toString(16)),
     data: data ? cleanHex(data) : '',
     chainId: chainId || 1
diff --git a/common/libs/validators.js b/common/libs/validators.js
index e4b4cdb9..1ba745ee 100644
--- a/common/libs/validators.js
+++ b/common/libs/validators.js
@@ -140,8 +140,11 @@ export function isValidRawTx(rawTx: RawTransaction): boolean {
   return true;
 }
 
-// Full length deterministic wallet paths from BIP32
-// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
+// Full length deterministic wallet paths from BIP44
+// https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
+// normal path length is 4, ledger is the exception at 3
 export function isValidPath(dPath: string) {
-  return dPath.split("'/").length === 4;
+  //TODO: use a regex to detect proper paths
+  const len = dPath.split("'/").length;
+  return len === 3 || len === 4;
 }
diff --git a/common/libs/values.js b/common/libs/values.js
index f7af6b72..f740e72f 100644
--- a/common/libs/values.js
+++ b/common/libs/values.js
@@ -1,7 +1,7 @@
 // @flow
 import { Ether } from 'libs/units';
 
-export function stripHex(address: string): string {
+export function stripHexPrefixAndLower(address: string): string {
   return address.replace('0x', '').toLowerCase();
 }
 
diff --git a/common/libs/wallet/deterministic.js b/common/libs/wallet/deterministic.js
index ac8ad6d0..d3fae175 100644
--- a/common/libs/wallet/deterministic.js
+++ b/common/libs/wallet/deterministic.js
@@ -4,10 +4,12 @@ import type { IWallet } from './IWallet';
 export default class DeterministicWallet implements IWallet {
   address: string;
   dPath: string;
+  index: number;
 
-  constructor(address: string, dPath: string) {
+  constructor(address: string, dPath: string, index: number) {
     this.address = address;
     this.dPath = dPath;
+    this.index = index;
   }
 
   getAddress(): Promise<string> {
@@ -15,6 +17,6 @@ export default class DeterministicWallet implements IWallet {
   }
 
   getPath(): string {
-    return this.dPath;
+    return `${this.dPath}/${this.index}`;
   }
 }
diff --git a/common/libs/wallet/index.js b/common/libs/wallet/index.js
index 80da4005..938340d0 100644
--- a/common/libs/wallet/index.js
+++ b/common/libs/wallet/index.js
@@ -6,3 +6,4 @@ export { default as EncryptedPrivKeyWallet } from './encprivkey';
 export { default as PresaleWallet } from './presale';
 export { default as MewV1Wallet } from './mewv1';
 export { default as UtcWallet } from './utc';
+export { default as MnemonicWallet } from './mnemonic';
diff --git a/common/libs/wallet/mnemonic.js b/common/libs/wallet/mnemonic.js
new file mode 100644
index 00000000..85842683
--- /dev/null
+++ b/common/libs/wallet/mnemonic.js
@@ -0,0 +1,9 @@
+// @flow
+import PrivKeyWallet from './privkey';
+import { decryptMnemonicToPrivKey } from 'libs/decrypt';
+
+export default class MnemonicWallet extends PrivKeyWallet {
+  constructor(phrase: string, pass: string, path: string, address: string) {
+    super(decryptMnemonicToPrivKey(phrase, pass, path, address));
+  }
+}
diff --git a/common/libs/wallet/privkey.js b/common/libs/wallet/privkey.js
index 152f66f9..78f5dcdb 100644
--- a/common/libs/wallet/privkey.js
+++ b/common/libs/wallet/privkey.js
@@ -11,7 +11,7 @@ import { signRawTxWithPrivKey, signMessageWithPrivKey } from 'libs/signing';
 import { isValidPrivKey } from 'libs/validators';
 import type { RawTransaction } from 'libs/transaction';
 import type { UtcKeystore } from 'libs/keystore';
-import { stripHex } from 'libs/values';
+import { stripHexPrefixAndLower } from 'libs/values';
 
 export default class PrivKeyWallet implements IWallet {
   privKey: Buffer;
@@ -43,7 +43,7 @@ export default class PrivKeyWallet implements IWallet {
   getNakedAddress(): Promise<string> {
     return new Promise(resolve => {
       this.getAddress().then(address => {
-        resolve(stripHex(address));
+        resolve(stripHexPrefixAndLower(address));
       });
     });
   }
diff --git a/common/libs/wallet/trezor.js b/common/libs/wallet/trezor.js
index dcefb1e6..d8145912 100644
--- a/common/libs/wallet/trezor.js
+++ b/common/libs/wallet/trezor.js
@@ -4,8 +4,7 @@ import EthTx from 'ethereumjs-tx';
 import Big from 'bignumber.js';
 import { addHexPrefix } from 'ethereumjs-util';
 import DeterministicWallet from './deterministic';
-import { stripHex } from 'libs/values';
-
+import { stripHexPrefixAndLower } from 'libs/values';
 import type { RawTransaction } from 'libs/transaction';
 
 export default class TrezorWallet extends DeterministicWallet {
@@ -14,12 +13,13 @@ export default class TrezorWallet extends DeterministicWallet {
       TrezorConnect.ethereumSignTx(
         // Args
         this.getPath(),
-        stripHex(tx.nonce),
-        stripHex(tx.gasPrice.toString()),
-        stripHex(tx.gasLimit.toString()),
-        stripHex(tx.to),
-        stripHex(tx.value),
-        stripHex(tx.data),
+        // stripHexPrefixAndLower identical to ethFuncs.getNakedAddress
+        stripHexPrefixAndLower(tx.nonce),
+        stripHexPrefixAndLower(tx.gasPrice.toString()),
+        stripHexPrefixAndLower(tx.gasLimit.toString()),
+        stripHexPrefixAndLower(tx.to),
+        stripHexPrefixAndLower(tx.value),
+        stripHexPrefixAndLower(tx.data),
         tx.chainId,
         // Callback
         result => {
diff --git a/common/sagas/deterministicWallets.js b/common/sagas/deterministicWallets.js
index dbae5a64..0ad6ca4a 100644
--- a/common/sagas/deterministicWallets.js
+++ b/common/sagas/deterministicWallets.js
@@ -30,21 +30,34 @@ import { getTokens } from 'selectors/wallet';
 import type { INode } from 'libs/nodes/INode';
 import type { Token } from 'config/data';
 
-// TODO: BIP39 for mnemonic wallets?
+import { showNotification } from 'actions/notifications';
+import translate from 'translations';
+
 function* getDeterministicWallets(
   action?: GetDeterministicWalletsAction
 ): Generator<Yield, Return, Next> {
   if (!action) return;
 
-  const { publicKey, chainCode, limit, offset } = action.payload;
-  const hdk = new HDKey();
-  hdk.publicKey = new Buffer(publicKey, 'hex');
-  hdk.chainCode = new Buffer(chainCode, 'hex');
+  const { seed, dPath, publicKey, chainCode, limit, offset } = action.payload;
+  let pathBase, hdk;
+
+  //if seed present, treat as mnemonic
+  //if pubKey & chainCode present, treat as HW wallet
+
+  if (seed) {
+    hdk = HDKey.fromMasterSeed(new Buffer(seed, 'hex'));
+    pathBase = dPath;
+  } else if (publicKey && chainCode) {
+    hdk = new HDKey();
+    hdk.publicKey = new Buffer(publicKey, 'hex');
+    hdk.chainCode = new Buffer(chainCode, 'hex');
+    pathBase = 'm';
+  } else return;
 
   const wallets = [];
   for (let i = 0; i < limit; i++) {
     const index = i + offset;
-    const dkey = hdk.derive(`m/${index}`);
+    const dkey = hdk.derive(`${pathBase}/${index}`);
     const address = publicToAddress(dkey.publicKey, true).toString('hex');
     wallets.push({
       index,
@@ -62,16 +75,22 @@ function* getDeterministicWallets(
 function* updateWalletValues(): Generator<Yield, Return, Next> {
   const node: INode = yield select(getNodeLib);
   const wallets: DeterministicWalletData[] = yield select(getWallets);
-  const calls = wallets.map(w => apply(node, node.getBalance, [w.address]));
-  const balances = yield all(calls);
 
-  for (let i = 0; i < wallets.length; i++) {
-    yield put(
-      updateDeterministicWallet({
-        ...wallets[i],
-        value: balances[i]
-      })
-    );
+  try {
+    const calls = wallets.map(w => apply(node, node.getBalance, [w.address]));
+    const balances = yield all(calls);
+
+    for (let i = 0; i < wallets.length; i++) {
+      yield put(
+        updateDeterministicWallet({
+          ...wallets[i],
+          value: balances[i]
+        })
+      );
+    }
+  } catch (err) {
+    console.log(err);
+    yield put(showNotification('danger', translate('ERROR_32')));
   }
 }
 
@@ -86,21 +105,27 @@ function* updateWalletTokenValues(): Generator<Yield, Return, Next> {
 
   const node: INode = yield select(getNodeLib);
   const wallets: DeterministicWalletData[] = yield select(getWallets);
-  const calls = wallets.map(w => {
-    return apply(node, node.getTokenBalance, [w.address, token]);
-  });
-  const tokenBalances = yield all(calls);
 
-  for (let i = 0; i < wallets.length; i++) {
-    yield put(
-      updateDeterministicWallet({
-        ...wallets[i],
-        tokenValues: {
-          ...wallets[i].tokenValues,
-          [desiredToken]: tokenBalances[i]
-        }
-      })
-    );
+  try {
+    const calls = wallets.map(w => {
+      return apply(node, node.getTokenBalance, [w.address, token]);
+    });
+    const tokenBalances = yield all(calls);
+
+    for (let i = 0; i < wallets.length; i++) {
+      yield put(
+        updateDeterministicWallet({
+          ...wallets[i],
+          tokenValues: {
+            ...wallets[i].tokenValues,
+            [desiredToken]: tokenBalances[i]
+          }
+        })
+      );
+    }
+  } catch (err) {
+    console.log(err);
+    yield put(showNotification('danger', translate('ERROR_32')));
   }
 }
 
diff --git a/common/sagas/wallet.js b/common/sagas/wallet.js
index a74cc628..c68ecd3f 100644
--- a/common/sagas/wallet.js
+++ b/common/sagas/wallet.js
@@ -5,7 +5,8 @@ import { takeEvery, call, apply, put, select, fork } from 'redux-saga/effects';
 import { setWallet, setBalance, setTokenBalances } from 'actions/wallet';
 import type {
   UnlockPrivateKeyAction,
-  UnlockKeystoreAction
+  UnlockKeystoreAction,
+  UnlockMnemonicAction
 } from 'actions/wallet';
 import { showNotification } from 'actions/notifications';
 import type { BroadcastTxRequestedAction } from 'actions/wallet';
@@ -19,6 +20,7 @@ import {
   UtcWallet,
   EncryptedPrivKeyWallet,
   PrivKeyWallet,
+  MnemonicWallet,
   IWallet
 } from 'libs/wallet';
 import { INode } from 'libs/nodes/INode';
@@ -141,6 +143,25 @@ export function* unlockKeystore(
   yield put(setWallet(wallet));
 }
 
+function* unlockMnemonic(
+  action?: UnlockMnemonicAction
+): Generator<Yield, Return, Next> {
+  if (!action) return;
+
+  let wallet;
+  const { phrase, pass, path, address } = action.payload;
+
+  try {
+    wallet = new MnemonicWallet(phrase, pass, path, address);
+  } catch (err) {
+    // TODO: use better error than 'ERROR_14' (wallet not found)
+    yield put(showNotification('danger', translate('ERROR_14')));
+    return;
+  }
+
+  yield put(setWallet(wallet));
+}
+
 function* broadcastTx(
   action: BroadcastTxRequestedAction
 ): Generator<Yield, Return, Next> {
@@ -176,6 +197,7 @@ export default function* walletSaga(): Generator<Yield, Return, Next> {
   yield [
     takeEvery('WALLET_UNLOCK_PRIVATE_KEY', unlockPrivateKey),
     takeEvery('WALLET_UNLOCK_KEYSTORE', unlockKeystore),
+    takeEvery('WALLET_UNLOCK_MNEMONIC', unlockMnemonic),
     takeEvery('WALLET_SET', updateBalances),
     takeEvery('CUSTOM_TOKEN_ADD', updateTokenBalances),
     // $FlowFixMe but how do I specify param types here flow?
diff --git a/package.json b/package.json
index 01c1551f..7498826b 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "dependencies": {
     "bignumber.js": "^4.0.2",
     "bootstrap-sass": "^3.3.7",
+    "bip39": "^2.4.0",
     "classnames": "^2.2.5",
     "ethereum-blockies": "git+https://github.com/MyEtherWallet/blockies.git",
     "ethereumjs-abi": "^0.6.4",
diff --git a/spec/libs/decrypt.spec.js b/spec/libs/decrypt.spec.js
index d42d0c9b..8135a364 100644
--- a/spec/libs/decrypt.spec.js
+++ b/spec/libs/decrypt.spec.js
@@ -2,7 +2,8 @@ import {
   decryptPrivKey,
   decodeCryptojsSalt,
   evp_kdf,
-  decipherBuffer
+  decipherBuffer,
+  decryptMnemonicToPrivKey
 } from '../../common/libs/decrypt';
 
 //deconstructed elements of a V1 encrypted priv key
@@ -71,3 +72,120 @@ describe('decipherBuffer', () => {
     expect(result.toString()).toEqual(str + '!');
   });
 });
+
+describe('decryptMnemonicToPrivKey', () => {
+  const mocks = [
+    {
+      phrase:
+        'first catalog away faculty jelly now life kingdom pigeon raise gain accident',
+      pass: '',
+      path: "m/44'/60'/0'/0/8",
+      address: '0xe2EdC95134bbD88443bc6D55b809F7d0C2f0C854',
+      privKey:
+        '31e97f395cabc6faa37d8a9d6bb185187c35704e7b976c7a110e2f0eab37c344'
+    },
+    {
+      phrase:
+        'grace near jewel celery divorce unlock thumb segment since photo cushion meat sketch tooth edit',
+      pass: '',
+      path: "m/44'/60'/0'/0/18",
+      address: '0xB20f8aCA62e18f4586aAEf4720daCac23cC29954',
+      privKey:
+        '594ee624ebad54b9469915c3f5eb22127727a5e380a17d24780dbe272996b401'
+    },
+    {
+      phrase:
+        'airport bid shop easy tiger rule under afraid lobster adapt ranch story elbow album rifle turtle earn witness',
+      pass: '',
+      path: "m/44'/60'/0'/0/24",
+      address: '0xE6D0932fFDDcB45bf0e18dE4716137dEdD2E4c2c',
+      privKey:
+        '6aba8bb6018a85af7cb552325b52e397f83cfb56f68cf8937aa14c3875bbb0aa'
+    },
+    {
+      phrase:
+        'plug strong practice prize crater private together anchor horror nasty option exhibit position engage pledge giggle soda lecture syrup ocean barrel',
+      pass: '',
+      path: "m/44'/60'/0'/0/0",
+      address: '0xd163f4d95782608b251c4d985846A1754c53D32C',
+      privKey:
+        '88046b4bdbb1c88945662cb0984258ca1b09df0bb0b38fdc55bcb8998f28aad4'
+    },
+    {
+      phrase:
+        'laptop pool call below prepare car alley wheel bunker valve soul misery buffalo home hobby timber enlist country mind guilt drastic castle cable federal',
+      pass: '',
+      path: "m/44'/60'/0'/0/4",
+      address: '0x04E2df6Fe2a28dd24dbCC49485ff30Fc3ea04822',
+      privKey:
+        'fc9ad0931a3aee167179c1fd31825b7a7b558b4bb2eb3fb0c04028c98d495907'
+    },
+    {
+      phrase:
+        'stadium river pigeon midnight grit truck fiscal eight hello rescue destroy eyebrow',
+      pass: 'password',
+      path: "m/44'/60'/0'/0/5",
+      address: '0xe74908668F594f327fd2215A2564Cf79298a136e',
+      privKey:
+        'b65abfb2660f71b4b46aed98975f0cc1ebe1fcb3835a7a10b236e4012c93f306'
+    },
+    {
+      phrase:
+        'oval save glimpse regret decline pottery wealth canal post sing congress bounce run unable stove',
+      pass: 'password',
+      path: "m/44'/60'/0'/0/10",
+      address: '0x0d20865AfAE9B8a1F867eCd60684FBCDA3Bd1FA5',
+      privKey:
+        '29eb9ec0f5586d1935bc4c6bd89e6fb3de76b4fad345fa844efc5432885cfe73'
+    },
+    {
+      phrase:
+        'lecture defy often frog young blush exact tomato culture north urge rescue resemble require bring dismiss actress fog',
+      pass: 'password',
+      path: "m/44'/60'/0'/0/7",
+      address: '0xdd5d6e5dEfD09c3F2BD6d994EE43B59df88c7187',
+      privKey:
+        'd13404b9b05f6b5bf8e5cf810aa903e4b60ac654b0acf09a8ea0efe174746ae5'
+    },
+    {
+      phrase:
+        'supreme famous violin such option marriage arctic genius member rare siege circle round field weather humble fame buffalo one control marble',
+      pass: 'password',
+      path: "m/44'/60'/0'/0/11",
+      address: '0x6d95e7cC28113F9491b2Ec6b621575a5565Fd208',
+      privKey:
+        'a52329aa3d6f2426f8783a1e5f419997e2628ec9a89cc2b7b182d2eaf7f95a24'
+    },
+    {
+      phrase:
+        'next random ready come great start beyond learn supply chimney include grocery fee phrase margin adult ocean craft topple subject satoshi angry mystery liar',
+      pass: 'password',
+      path: "m/44'/60'/0'/0/4",
+      address: '0x3e583eF3d3cE5Dd483c86A1E00A479cE11Ca21Cf',
+      privKey:
+        '450538d4181c4d8ce076ecb34785198316adebe959d6f9462cfb68a58b1819bc'
+    },
+    {
+      phrase:
+        'champion pitch profit beyond know imitate weasel gift escape bullet price barely crime renew hurry',
+      pass: 'password123',
+      path: "m/44'/60'/0'/1",
+      address: '0x7545D615643F933c34C3E083E68CC831167F31af',
+      privKey:
+        '0a43098da5ae737843e385b76b44266a9f8f856cb1b943055b5a96188d306d97'
+    }
+  ];
+
+  it('should derive correct private key from variable phrase lengths/passwords/paths', () => {
+    mocks.forEach(mock => {
+      const { phrase, pass, path, privKey, address } = mock;
+      const derivedPrivKey = decryptMnemonicToPrivKey(
+        phrase,
+        pass,
+        path,
+        address
+      );
+      expect(derivedPrivKey.toString('hex')).toEqual(privKey);
+    });
+  });
+});