You will need
  • the Nokia.
Click on the top button "House", then select the "Settings" tab and go to a choice of modes. Change offline mode on normal.
Unplug the phone, pull the SIM card. After a short period of time insert the SIM card into the provided for this purpose in the telephone place. Reboot the phone and try to change offline mode on normal.
Take the phone to a service center, if all attempts to switch the device from offline mode to normal were unsuccessful.