Fix notification and ringing problems

Calls don't ring or messages don't arrive when the app is closed

1. More → Notifications → turn on Always connected.
2. Phone settings → Apps → Tellu → Battery → Unrestricted (or turn off "Battery optimisation").
3. On Xiaomi, Redmi and POCO: turn on Autostart for Tellu. On Samsung: remove Tellu from "Sleeping apps".
4. Make sure Tellu notifications are allowed: More → Notifications → System notification settings.
5. Allow Tellu to "show full-screen calls" if your phone asks — without it the ringing screen doesn't appear over the lock screen, only a notification.

Tapping the notification opened the home screen instead of the call — update Tellu to the latest version; tapping the call notification opens the ringing screen.

I don't see my camera behind a video call's ringing screen when my phone is locked — it only shows if you have already allowed Tellu to use the Camera. Open any video call once and allow it.

A call arrives without ringing — check: is your status Do not disturb? Is the person in a circle that is quiet outside hours? Did you mute them? Is your phone on silent?

I don't want notifications from a person or group — their profile → Mute notifications.