diff --git a/lib/account.js b/lib/account.js
index af0c00a..da6c1ce 100644
--- a/lib/account.js
+++ b/lib/account.js
@@ -1,134 +1,135 @@
 'use strict';
 
 import debug from 'debug';
-import transform from 'sdp-transform';
 import md5 from 'blueimp-md5';
+import transform from 'sdp-transform';
+
 
 import { EventEmitter } from 'events';
 import { Call, Identity } from './call';
 
 const DEBUG = debug('sylkrtc:Account');
 
 
 class Account extends EventEmitter {
     constructor(options, connection) {
         if (options.account.indexOf('@') === -1) {
             throw new Error('Invalid account id specified');
         }
         super();
         const id = options.account;
         const [username, domain] = id.split('@');
         this._id = id;
         this._displayName = options.displayName;
         this._password = md5(username + ':' + (options.realm || domain)+ ':' + options.password);
         this._connection = connection;
         this._registrationState = null;
         this._calls = new Map();
     }
 
     get id() {
         return this._id;
     }
 
     get password() {
         return this._password;
     }
 
     get displayName() {
         return this._displayName;
     }
 
     get registrationState() {
         return this._registrationState;
     }
 
     register() {
         let req = {
             sylkrtc: 'account-register',
             account: this._id
         };
         this._sendRequest(req, (error) => {
             if (error) {
                 DEBUG('Register error: %s', error);
                 const oldState = this._registrationState;
                 const newState = 'failed';
                 let data = {reason: error.toString()};
                 this._registrationState = newState;
                 this.emit('registrationStateChanged', oldState, newState, data);
             }
         });
     }
 
     unregister() {
         let req = {
             sylkrtc: 'account-unregister',
             account: this._id,
         };
         this._sendRequest(req, (error) => {
             if (error) {
                 DEBUG('Unregister error: %s', error);
             }
             const oldState = this._registrationState;
             const newState = null;
             this._registrationState = newState;
             this.emit('registrationStateChanged', oldState, newState, {});
         });
     }
 
     call(uri, options={}) {
         let callObj = new Call(this);
         callObj._initOutgoing(uri, options);
         this._calls.set(callObj.id, callObj);
         this.emit('outgoingCall', callObj);
         return callObj;
     }
 
     // Private API
 
     _handleEvent(message) {
         DEBUG('Received account event: %s', message.event);
         let data = {};
         switch (message.event) {
             case 'registration_state':
                 const oldState = this._registrationState;
                 const newState = message.data.state;
                 this._registrationState = newState;
                 if (newState === 'failed') {
                     data.reason = message.data.reason;
                 }
                 this.emit('registrationStateChanged', oldState, newState, data);
                 break;
             case 'incoming_session':
                 let call = new Call(this);
                 call._initIncoming(message.session, message.data.originator, message.data.sdp);
                 this._calls.set(call.id, call);
                 // see what media types are offered
                 let mediaTypes = { audio: false, video: false };
                 const parsedSdp = transform.parse(message.data.sdp);
                 for (let media of parsedSdp.media) {
                     if (media.type === 'audio' && media.port !== 0 && media.direction === 'sendrecv') {
                         mediaTypes.audio = true;
                     } else if (media.type === 'video' && media.port !== 0 && media.direction === 'sendrecv') {
                         mediaTypes.video = true;
                     }
                 }
                 DEBUG('Incoming call from %s with media types: %o', message.data.originator.uri, mediaTypes);
                 this.emit('incomingCall', call, mediaTypes);
                 break;
             case 'missed_session':
                 data.originator = new Identity(message.data.originator.uri, message.data.originator.display_name);
                 this.emit('missedCall', data);
                 break;
             default:
                 break;
         }
     }
 
     _sendRequest(req, cb) {
         this._connection._sendRequest(req, cb);
     }
 
 }
 
 
 export { Account };
diff --git a/lib/connection.js b/lib/connection.js
index 62bdd13..4ef1274 100644
--- a/lib/connection.js
+++ b/lib/connection.js
@@ -1,284 +1,311 @@
 'use strict';
 
+import bowser from 'bowser';
 import debug from 'debug';
 import uuid from 'node-uuid';
 
 import { EventEmitter } from 'events';
 import { setImmediate } from 'timers';
 import { w3cwebsocket as W3CWebSocket } from 'websocket';
 import { Account } from './account';
 
 const SYLKRTC_PROTO = 'sylkRTC-1';
 const DEBUG = debug('sylkrtc:Connection');
 
 const MSECS = 1000;
 const INITIAL_DELAY = 0.5 * MSECS;
 const MAX_DELAY = 64 * MSECS;
 
+// compute a string for our well-known platforms
+let platform;
+if (bowser.iphone) {
+    platform = 'iPhone';
+} else if (bowser.ipad) {
+    platform = 'iPad';
+} else if (bowser.ipod) {
+    platform = 'iPod';
+} else if (bowser.android) {
+    platform = 'Android';
+} else if (bowser.mac) {
+    platform = 'OSX';
+} else if (bowser.linux) {
+    platform = 'Linux';
+} else if (bowser.windows) {
+    platform = 'Windows';
+} else {
+    platform = 'Unknown';
+}
+if (bowser.osversion) {
+    platform = `%{platform} ${bowser.osversion}`;
+}
+
+const USER_AGENT = `SylkRTC (${bowser.name} ${bowser.version} on ${platform})`;
+
 
 class Connection extends EventEmitter {
     constructor(options = {}) {
         if (!options.server) {
             throw new Error('\"server\" must be specified');
         }
         super();
         this._wsUri = options.server;
         this._sock = null;
         this._state = null;
         this._closed = false;
         this._timer = null;
         this._delay = INITIAL_DELAY;
         this._accounts = new Map();
         this._requests = new Map();
     }
 
     get state() {
         return this._state;
     }
 
     close() {
         if (this._closed) {
             return;
         }
         this._closed = true;
         if (this._timer) {
             clearTimeout(this._timer);
             this._timer = null;
         }
         if (this._sock) {
             this._sock.close();
             this._sock = null;
         } else {
             setImmediate(() => {
                 this._setState('closed');
             });
         }
     }
 
     addAccount(options = {}, cb = null) {
         if (typeof options.account !== 'string' || typeof options.password !== 'string') {
             throw new Error('Invalid options, \"account\" and \"password\" must be supplied');
         }
         if (this._accounts.has(options.account)) {
             throw new Error('Account already added');
         }
 
         let acc = new Account(options, this);
         // add it early to the set so we don't add it more than once, ever
         this._accounts.set(acc.id, acc);
 
         let req = {
             sylkrtc: 'account-add',
             account: acc.id,
             password: acc.password,
-            display_name: acc.displayName
+            display_name: acc.displayName,
+            user_agent: USER_AGENT
         };
         this._sendRequest(req, (error) => {
             if (error) {
                 DEBUG('add_account error: %s', error);
                 this._accounts.delete(acc.id);
                 acc = null;
             }
             if (cb) {
                 cb(error, acc);
             }
         });
 
     }
 
     removeAccount(account, cb=null) {
         const acc = this._accounts.get(account.id);
         if (account !== acc) {
             throw new Error('Unknown account');
         }
 
         // delete the account from the mapping, regardless of the result
         this._accounts.delete(account.id);
 
         let req = {
             sylkrtc: 'account-remove',
             account: acc.id
         };
         this._sendRequest(req, (error) => {
             if (error) {
                 DEBUG('remove_account error: %s', error);
             }
             if (cb) {
                 cb();
             }
         });
 
     }
 
     reconnect() {
         if (this._state === 'disconnected') {
             clearTimeout(this._timer);
             this._delay = INITIAL_DELAY;
             this._timer = setTimeout(() => {
                 this._connect();
             }, this._delay);
         }
     }
 
     // Private API
 
     _initialize() {
         if (this._sock !== null) {
             throw new Error('WebSocket already initialized');
         }
         if (this._timer !== null) {
             throw new Error('Initialize is in progress');
         }
 
         DEBUG('Initializing');
 
         if (process.browser) {
             window.addEventListener('beforeunload', () => {
                 if (this._sock !== null) {
                     let noop = function() {};
                     this._sock.onerror = noop;
                     this._sock.onmessage = noop;
                     this._sock.onclose = noop;
                     this._sock.close();
                 }
             });
         }
 
         this._timer = setTimeout(() => {
             this._connect();
         }, this._delay);
     }
 
     _connect() {
         DEBUG('WebSocket connecting');
         this._setState('connecting');
 
         this._sock = new W3CWebSocket(this._wsUri, SYLKRTC_PROTO);
         this._sock.onopen = () => {
             DEBUG('WebSocket connection open');
             this._onOpen();
         };
         this._sock.onerror = () => {
             DEBUG('WebSocket connection got error');
         };
         this._sock.onclose = (event) => {
             DEBUG('WebSocket connection closed: %d: (reason=\"%s\", clean=%s)', event.code, event.reason, event.wasClean);
             this._onClose();
         };
         this._sock.onmessage = (event) => {
             DEBUG('WebSocket received message: %o', event);
             this._onMessage(event);
         };
     }
 
     _sendRequest(req, cb) {
         const transaction = uuid.v4();
         req.transaction = transaction;
         if (this._state !== 'ready') {
             setImmediate(() => {
                 cb(new Error('Connection is not ready'));
             });
             return;
         }
         this._requests.set(transaction, {req: req, cb: cb});
         this._sock.send(JSON.stringify(req));
     }
 
     _setState(newState) {
         DEBUG('Set state: %s -> %s', this._state, newState);
         const oldState = this._state;
         this._state = newState;
         this.emit('stateChanged', oldState, newState);
     }
 
     // WebSocket callbacks
 
     _onOpen() {
         clearTimeout(this._timer);
         this._timer = null;
         this._delay = INITIAL_DELAY;
         this._setState('connected');
     }
 
     _onClose() {
         this._sock = null;
         if (this._timer) {
             clearTimeout(this._timer);
             this._timer = null;
         }
 
         // remove all accounts, the server no longer has them anyway
         this._accounts.clear();
 
         this._setState('disconnected');
         if (!this._closed) {
             this._delay = this._delay * 2;
             if (this._delay > MAX_DELAY) {
                 this._delay = INITIAL_DELAY;
             }
             DEBUG('Retrying connection in %s seconds', this._delay / MSECS);
             this._timer = setTimeout(() => {
                 this._connect();
             }, this._delay);
         } else {
             this._setState('closed');
         }
     }
 
     _onMessage(event) {
         let message = JSON.parse(event.data);
         if (typeof message.sylkrtc === 'undefined') {
             DEBUG('Unrecognized message received');
             return;
         }
 
         DEBUG('Received \"%s\" message: %o', message.sylkrtc, message);
 
         if (message.sylkrtc === 'event') {
             DEBUG('Received event: \"%s\"', message.event);
             switch (message.event) {
                 case 'ready':
                     this._setState('ready');
                     break;
                 default:
                     break;
             }
         } else if (message.sylkrtc === 'account_event') {
             let acc = this._accounts.get(message.account);
             if (!acc) {
                 DEBUG('Account %s not found', message.account);
                 return;
             }
             acc._handleEvent(message);
         } else if (message.sylkrtc === 'session_event') {
             const sessionId = message.session;
             for (let acc of this._accounts.values()) {
                 let call = acc._calls.get(sessionId);
                 if (call) {
                     call._handleEvent(message);
                     break;
                 }
             }
         } else if (message.sylkrtc === 'ack' || message.sylkrtc === 'error') {
             const transaction = message.transaction;
             const data = this._requests.get(transaction);
             if (!data) {
                 DEBUG('Could not find transaction %s', transaction);
                 return;
             }
             this._requests.delete(transaction);
             DEBUG('Received \"%s\" for request: %o', message.sylkrtc, data.req);
             if (data.cb) {
                 if (message.sylkrtc === 'ack') {
                     data.cb(null);
                 } else {
                     data.cb(new Error(message.error));
                 }
             }
         }
     }
 
 }
 
 
 export { Connection };
diff --git a/package.json b/package.json
index a0d70bd..90421ea 100644
--- a/package.json
+++ b/package.json
@@ -1,46 +1,47 @@
 {
   "name": "sylkrtc",
   "version": "0.6.1",
   "main": "lib/sylkrtc.js",
   "description": "SylkServer WebRTC Gateway client library",
   "repository": {
     "type": "git",
     "url": "git://github.com/AGProjects/sylkrtc.git"
   },
   "keywords": [],
   "author": "AG Projects",
   "contributors": [
     "Tijmen de Mes <tijmen@ag-projects.com>",
     "Saúl Ibarra Corretgé <saul@ag-projects.com>"
   ],
   "license": "MIT",
   "readmeFilename": "README.md",
   "browserify": {
     "transform": [
       "babelify"
     ]
   },
   "dependencies": {
     "blueimp-md5": "^2.3.0",
+    "bowser": "^1.3.0",
     "debug": "^2.2.0",
     "node-uuid": "^1.4.7",
     "rtcninja": "^0.6.6",
     "sdp-transform": "^1.6.2",
     "websocket": "^1.0.23"
   },
   "devDependencies": {
     "babel-preset-es2015": "^6.9.0",
     "babelify": "^7.3.0",
     "browserify": "^13.0.1",
     "gulp": "git+https://github.com/gulpjs/gulp.git#4.0",
     "gulp-filelog": "^0.4.1",
     "gulp-header": "^1.8.2",
     "gulp-jshint": "^2.0.1",
     "gulp-sourcemaps": "^1.6.0",
     "gulp-uglify": "^1.5.3",
     "gulp-util": "^3.0.7",
     "jshint-stylish": "^2.2.0",
     "vinyl-buffer": "^1.0.0",
     "vinyl-source-stream": "^1.1.0"
   }
 }