Nokia Lumia 521 - I cannot get a network signal on my Lumia phone

  1. Check the signal strength on the phone screen, and move to an area with better reception. If you continuously experience low signal strength in a certain area, the network coverage may be insufficient there. For more info, contact your network operator.
  2. Remove any accessory covers or shells from the phone temporarily to check if they affect the signal strength.
  3. Set your phone to use 2G (GSM) network only (Settings > mobile network (cellular) > Highest connection speed) in case the operator does not permit you to use 3G or 4G service.
  4. Switch flight mode (airplane mode) On and back Off in Settings. This resets the active connection.
  5. Check that your SIM card is fully inserted. Do not use SIM cards that have been modified to fit the SIM slot.
  6. If possible, try your SIM card in another phone.