- Inside the app: a glass bubble drops from the top; tap it to open the chat.
- With the app closed: a notification with the sender's photo and latest messages, with direct Reply and Mark as read.
- Settings: More → Notifications: message sound, Always connected (turn it on only if you miss calls or messages while the app is closed — some phones such as Xiaomi stop apps in the background), and travel tips.
- Mute a person: their profile → Mute notifications (8 hours, a week, always).
Common problem — notifications don't arrive: turn on "Always connected", and in your phone settings allow Tellu to run in the background and turn off battery saving for it.