diff --git a/js/src/modals/SMSVerification/store.js b/js/src/modals/SMSVerification/store.js
new file mode 100644
index 000000000..669a168e6
--- /dev/null
+++ b/js/src/modals/SMSVerification/store.js
@@ -0,0 +1,191 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { observable, computed, autorun, action } from 'mobx';
+import phone from 'phoneformat.js';
+import { sha3 } from '../../api/util/sha3';
+
+import ABI from '../../contracts/abi/sms-verification.json';
+// TODO: move this to a better place
+const contract = '0xcE381B876A85A72303f7cA7b3a012f58F4CEEEeB';
+
+import checkIfVerified from './check-if-verified';
+import checkIfRequested from './check-if-requested';
+import waitForConfirmations from './wait-for-confirmations';
+import postToVerificationServer from './post-to-verification-server';
+
+const validCode = /^[A-Z0-9_-]{7,14}$/i;
+
+export default class VerificationStore {
+  static GATHERING_DATA = 'gathering-data';
+  static GATHERED_DATA = 'gathered-data';
+  static POSTING_REQUEST = 'posting-request';
+  static POSTED_REQUEST = 'posted-request';
+  static REQUESTING_SMS = 'requesting-sms';
+  static REQUESTED_SMS = 'requested-sms';
+  static QUERY_CODE = 'query-code';
+  static POSTING_CONFIRMATION = 'posting-confirmation';
+  static POSTED_CONFIRMATION = 'posted-confirmation';
+  static DONE = 'done';
+
+  @observable step = null;
+  @observable error = null;
+
+  @observable fee = null;
+  @observable isVerified = null;
+  @observable hasRequested = null;
+  @observable consentGiven = false;
+  @observable number = '';
+  @observable requestTx = null;
+  @observable code = '';
+  @observable confirmationTx = null;
+
+  @computed get isCodeValid () {
+    return validCode.test(this.code);
+  }
+  @computed get isNumberValid () {
+    return phone.isValidNumber(this.number);
+  }
+
+  constructor (api, account) {
+    this.api = api;
+    this.account = account;
+    this.contract = api.newContract(ABI, contract);
+
+    autorun(() => {
+      if (this.error) {
+        console.error('sms verification: ' + this.error);
+      }
+    });
+  }
+
+  @action gatherData = () => {
+    const { contract, account } = this;
+    this.step = VerificationStore.GATHERING_DATA;
+
+    const fee = contract.instance.fee.call()
+      .then((fee) => {
+        this.fee = fee;
+      })
+      .catch((err) => {
+        this.error = 'Failed to fetch the fee: ' + err.message;
+      });
+
+    const isVerified = checkIfVerified(contract, account)
+      .then((isVerified) => {
+        this.isVerified = isVerified;
+      })
+      .catch((err) => {
+        this.error = 'Failed to check if verified: ' + err.message;
+      });
+
+    const hasRequested = checkIfRequested(contract, account)
+      .then((hasRequested) => {
+        this.hasRequested = hasRequested;
+      })
+      .catch((err) => {
+        this.error = 'Failed to check if requested: ' + err.message;
+      });
+
+    Promise.all([ fee, isVerified, hasRequested ])
+    .then(() => {
+      this.step = VerificationStore.GATHERED_DATA;
+    });
+  }
+
+  @action setNumber = (number) => {
+    this.number = number;
+  }
+
+  @action setConsentGiven = (consentGiven) => {
+    this.consentGiven = consentGiven;
+  }
+
+  @action sendRequest = () => {
+    const { api, account, contract, fee, number, hasRequested } = this;
+
+    const request = contract.functions.find((fn) => fn.name === 'request');
+    const options = { from: account, value: fee.toString() };
+
+    let chain = Promise.resolve();
+    if (!hasRequested) {
+      this.step = VerificationStore.POSTING_REQUEST;
+      chain = request.estimateGas(options, [])
+        .then((gas) => {
+          options.gas = gas.mul(1.2).toFixed(0);
+          return request.postTransaction(options, []);
+        })
+        .then((handle) => {
+          // TODO: The "request rejected" error doesn't have any property to
+          // distinguish it from other errors, so we can't give a meaningful error here.
+          return api.pollMethod('parity_checkRequest', handle);
+        })
+        .then((txHash) => {
+          this.requestTx = txHash;
+          this.step = VerificationStore.POSTED_REQUEST;
+          return waitForConfirmations(api, txHash, 1);
+        });
+    }
+
+    chain
+      .then(() => {
+        this.step = VerificationStore.REQUESTING_SMS;
+        return postToVerificationServer({ number, address: account });
+      })
+      .then(() => {
+        this.step = VerificationStore.REQUESTED_SMS;
+      })
+      .catch((err) => {
+        this.error = 'Failed to request a confirmation SMS: ' + err.message;
+      });
+  }
+
+  @action setCode = (code) => {
+    this.code = code;
+  }
+
+  @action sendConfirmation = () => {
+    const { api, account, contract, code } = this;
+    const token = sha3(code);
+
+    const confirm = contract.functions.find((fn) => fn.name === 'confirm');
+    const options = { from: account };
+    const values = [ token ];
+
+    this.step = VerificationStore.POSTING_CONFIRMATION;
+    confirm.estimateGas(options, values)
+      .then((gas) => {
+        options.gas = gas.mul(1.2).toFixed(0);
+        return confirm.postTransaction(options, values);
+      })
+      .then((handle) => {
+        // TODO: The "request rejected" error doesn't have any property to
+        // distinguish it from other errors, so we can't give a meaningful error here.
+        return api.pollMethod('parity_checkRequest', handle);
+      })
+      .then((txHash) => {
+        this.confirmationTx = txHash;
+        this.step = VerificationStore.POSTED_CONFIRMATION;
+        return waitForConfirmations(api, txHash, 2);
+      })
+      .then(() => {
+        this.step = VerificationStore.DONE;
+      })
+      .catch((err) => {
+        this.error = 'Failed to send the verification code: ' + err.message;
+      });
+  }
+}