diff --git a/res/css/structures/auth/_CompleteSecurity.scss b/res/css/structures/auth/_CompleteSecurity.scss
index 2bf51d9574..601492d43c 100644
--- a/res/css/structures/auth/_CompleteSecurity.scss
+++ b/res/css/structures/auth/_CompleteSecurity.scss
@@ -37,6 +37,10 @@ limitations under the License.
     font-size: 15px;
 }
 
+.mx_CompleteSecurity_waiting {
+    color: $notice-secondary-color;
+}
+
 .mx_CompleteSecurity_actionRow {
     display: flex;
     justify-content: flex-end;
diff --git a/src/components/structures/auth/CompleteSecurity.js b/src/components/structures/auth/CompleteSecurity.js
index 2e95f668a6..e8a5e3db49 100644
--- a/src/components/structures/auth/CompleteSecurity.js
+++ b/src/components/structures/auth/CompleteSecurity.js
@@ -54,7 +54,7 @@ export default class CompleteSecurity extends React.Component {
         }
     }
 
-    onStartClick = async () => {
+    _onUsePassphraseClick = async () => {
         this.setState({
             phase: PHASE_BUSY,
         });
@@ -148,13 +148,27 @@ export default class CompleteSecurity extends React.Component {
                 member={MatrixClientPeg.get().getUser(this.state.verificationRequest.otherUserId)}
             />;
         } else if (phase === PHASE_INTRO) {
+            const InlineSpinner = sdk.getComponent('elements.InlineSpinner');
+
             icon = <span className="mx_CompleteSecurity_headerIcon mx_E2EIcon_warning"></span>;
             title = _t("Complete security");
             body = (
                 <div>
                     <p>{_t(
-                        "Verify this session to grant it access to encrypted messages.",
+                        "Open an existing session & use it to verify this one, " +
+                        "granting it access to encrypted messages.",
                     )}</p>
+                    <p className="mx_CompleteSecurity_waiting"><InlineSpinner />{_t("Waiting…")}</p>
+                    <p>{_t(
+                        "If you can’t access one, <button>use your recovery key or passphrase.</button>",
+                    {}, {
+                        button: sub => <AccessibleButton element="span"
+                            className="mx_linkButton"
+                            onClick={this._onUsePassphraseClick}
+                        >
+                            {sub}
+                        </AccessibleButton>,
+                    })}</p>
                     <div className="mx_CompleteSecurity_actionRow">
                         <AccessibleButton
                             kind="danger"
@@ -162,12 +176,6 @@ export default class CompleteSecurity extends React.Component {
                         >
                             {_t("Skip")}
                         </AccessibleButton>
-                        <AccessibleButton
-                            kind="primary"
-                            onClick={this.onStartClick}
-                        >
-                            {_t("Start")}
-                        </AccessibleButton>
                     </div>
                 </div>
             );
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 5f3ead1490..183acea3e6 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -1973,7 +1973,9 @@
     "Uploading %(filename)s and %(count)s others|one": "Uploading %(filename)s and %(count)s other",
     "Could not load user profile": "Could not load user profile",
     "Complete security": "Complete security",
-    "Verify this session to grant it access to encrypted messages.": "Verify this session to grant it access to encrypted messages.",
+    "Open an existing session & use it to verify this one, granting it access to encrypted messages.": "Open an existing session & use it to verify this one, granting it access to encrypted messages.",
+    "Waiting…": "Waiting…",
+    "If you can’t access one, <button>use your recovery key or passphrase.</button>": "If you can’t access one, <button>use your recovery key or passphrase.</button>",
     "Session verified": "Session verified",
     "Your new session is now verified. It has access to your encrypted messages, and other users will see it as trusted.": "Your new session is now verified. It has access to your encrypted messages, and other users will see it as trusted.",
     "Your new session is now verified. Other users will see it as trusted.": "Your new session is now verified. Other users will see it as trusted.",