Nokia Lumia 900 - I cannot receive any calls on my Lumia phone

  1. Check the cellular signal strength on the phone screen, and move to an area with better reception.
  2. Try reconnecting by switching flight mode (airplane mode) On and back Off in Settings. This resets the active connection.
  3. Check the ringer volume and profile. Press the volume key to see the volume status bar at the top of the screen. Use the volume (+) (-) keys to adjust the loudness of the ringer (scale 0 to 30). Tap on the text next to the ringer icon and change the profile to ring+vibrate.
  4. Make sure that call forwarding is not switched on: Tap the phone icon > ...Settings.

If the problem persists, restart your phone by pressing and holding the Power and Volume Down keys simultaneously until the phone vibrates. Release and the phone will restart.