Open the bell or the Notifications page.
Identify the lead and notification type.
Click Answer if the call is still active.
Click Call back to return a missed call immediately.
Click View SMS to open the correct conversation.
Click Mark as read when the notification is handled.

You can filter the page by state, type, or search. Times use the workspace timezone.
Answer disappears when the call is no longer active.
Call back starts an immediate call but does not create a task. Create a task if the callback should happen later.
If an expected message is missing, also check the SMS inbox.