diff --git a/src/Signup.js b/src/Signup.js
index 74c4ad5f19..42468959fe 100644
--- a/src/Signup.js
+++ b/src/Signup.js
@@ -69,6 +69,10 @@ class Register extends Signup {
         this.params.idSid = idSid;
     }
 
+    setGuestAccessToken(token) {
+        this.guestAccessToken = token;
+    }
+
     getStep() {
         return this._step;
     }
@@ -126,7 +130,8 @@ class Register extends Signup {
         }
 
         return MatrixClientPeg.get().register(
-            this.username, this.password, this.params.sessionId, authDict, bindEmail
+            this.username, this.password, this.params.sessionId, authDict, bindEmail,
+            this.guestAccessToken
         ).then(function(result) {
             self.credentials = result;
             self.setStep("COMPLETE");
diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index 5760453670..118b43ef9a 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -225,6 +225,14 @@ module.exports = React.createClass({
                     screen: 'post_registration'
                 });
                 break;
+            case 'start_upgrade_registration':
+                this.replaceState({
+                    screen: "register",
+                    upgradeUsername: MatrixClientPeg.get().getUserIdLocalpart(),
+                    guestAccessToken: MatrixClientPeg.get().getAccessToken()
+                });
+                this.notifyNewScreen('register');
+                break;
             case 'token_login':
                 if (this.state.logged_in) return;
 
@@ -784,6 +792,9 @@ module.exports = React.createClass({
                     sessionId={this.state.register_session_id}
                     idSid={this.state.register_id_sid}
                     email={this.props.startingQueryParams.email}
+                    username={this.state.upgradeUsername}
+                    disableUsernameChanges={Boolean(this.state.upgradeUsername)}
+                    guestAccessToken={this.state.guestAccessToken}
                     hsUrl={this.props.config.default_hs_url}
                     isUrl={this.props.config.default_is_url}
                     registrationUrl={this.props.registrationUrl}
diff --git a/src/components/structures/UserSettings.js b/src/components/structures/UserSettings.js
index c1550f9b6b..ddf4229170 100644
--- a/src/components/structures/UserSettings.js
+++ b/src/components/structures/UserSettings.js
@@ -135,6 +135,12 @@ module.exports = React.createClass({
         });
     },
 
+    onUpgradeClicked: function() {
+        dis.dispatch({
+            action: "start_upgrade_registration"
+        });
+    },
+
     onLogoutPromptCancel: function() {
         this.logoutModal.closeDialog();
     },
@@ -164,6 +170,28 @@ module.exports = React.createClass({
             this.state.avatarUrl ? MatrixClientPeg.get().mxcUrlToHttp(this.state.avatarUrl) : null
         );
 
+        var accountJsx;
+
+        if (MatrixClientPeg.get().isGuest()) {
+            accountJsx = (
+                <div className="mx_UserSettings_button" onClick={this.onUpgradeClicked}>
+                    Upgrade (It's free!)
+                </div>
+            );
+        }
+        else {
+            accountJsx = (
+                <ChangePassword
+                        className="mx_UserSettings_accountTable"
+                        rowClassName="mx_UserSettings_profileTableRow"
+                        rowLabelClassName="mx_UserSettings_profileLabelCell"
+                        rowInputClassName="mx_UserSettings_profileInputCell"
+                        buttonClassName="mx_UserSettings_button"
+                        onError={this.onPasswordChangeError}
+                        onFinished={this.onPasswordChanged} />
+            );
+        }
+
         return (
             <div className="mx_UserSettings">
                 <RoomHeader simpleHeader="Settings" />
@@ -213,14 +241,7 @@ module.exports = React.createClass({
                 <h2>Account</h2>
 
                 <div className="mx_UserSettings_section">
-                    <ChangePassword
-                        className="mx_UserSettings_accountTable"
-                        rowClassName="mx_UserSettings_profileTableRow"
-                        rowLabelClassName="mx_UserSettings_profileLabelCell"
-                        rowInputClassName="mx_UserSettings_profileInputCell"
-                        buttonClassName="mx_UserSettings_button"
-                        onError={this.onPasswordChangeError}
-                        onFinished={this.onPasswordChanged} />                   
+                    {accountJsx}
                 </div>
 
                 <div className="mx_UserSettings_logout">
diff --git a/src/components/structures/login/Registration.js b/src/components/structures/login/Registration.js
index 7f6e408fef..f89d65d740 100644
--- a/src/components/structures/login/Registration.js
+++ b/src/components/structures/login/Registration.js
@@ -19,7 +19,6 @@ limitations under the License.
 var React = require('react');
 
 var sdk = require('../../../index');
-var MatrixClientPeg = require('../../../MatrixClientPeg');
 var dis = require('../../../dispatcher');
 var Signup = require("../../../Signup");
 var ServerConfig = require("../../views/login/ServerConfig");
@@ -40,6 +39,9 @@ module.exports = React.createClass({
         hsUrl: React.PropTypes.string,
         isUrl: React.PropTypes.string,
         email: React.PropTypes.string,
+        username: React.PropTypes.string,
+        guestAccessToken: React.PropTypes.string,
+        disableUsernameChanges: React.PropTypes.bool,
         // registration shouldn't know or care how login is done.
         onLoginClick: React.PropTypes.func.isRequired
     },
@@ -63,6 +65,7 @@ module.exports = React.createClass({
         this.registerLogic.setSessionId(this.props.sessionId);
         this.registerLogic.setRegistrationUrl(this.props.registrationUrl);
         this.registerLogic.setIdSid(this.props.idSid);
+        this.registerLogic.setGuestAccessToken(this.props.guestAccessToken);
         this.registerLogic.recheckState();
     },
 
@@ -186,7 +189,9 @@ module.exports = React.createClass({
                 registerStep = (
                     <RegistrationForm
                         showEmail={true}
+                        defaultUsername={this.props.username}
                         defaultEmail={this.props.email}
+                        disableUsernameChanges={this.props.disableUsernameChanges}
                         minPasswordLength={MIN_PASSWORD_LENGTH}
                         onError={this.onFormValidationFailed}
                         onRegisterClick={this.onFormSubmit} />
diff --git a/src/components/views/login/RegistrationForm.js b/src/components/views/login/RegistrationForm.js
index bc461dd1bb..534464a4ae 100644
--- a/src/components/views/login/RegistrationForm.js
+++ b/src/components/views/login/RegistrationForm.js
@@ -30,6 +30,7 @@ module.exports = React.createClass({
         defaultUsername: React.PropTypes.string,
         showEmail: React.PropTypes.bool,
         minPasswordLength: React.PropTypes.number,
+        disableUsernameChanges: React.PropTypes.bool,
         onError: React.PropTypes.func,
         onRegisterClick: React.PropTypes.func // onRegisterClick(Object) => ?Promise
     },
@@ -109,7 +110,8 @@ module.exports = React.createClass({
                     {emailSection}
                     <br />
                     <input className="mx_Login_field" type="text" ref="username"
-                        placeholder="User name" defaultValue={this.state.username} />
+                        placeholder="User name" defaultValue={this.state.username}
+                        disabled={this.props.disableUsernameChanges} />
                     <br />
                     <input className="mx_Login_field" type="password" ref="password"
                         placeholder="Password" defaultValue={this.state.password} />