Nokia Asha 305 - My phone does not recognise my SIM card

  1. Restart your phone. 
  2. Check that your SIM card is fully inserted. Do not use SIM cards that have been modified to fit the SIM slot.
  3. Your phone may be SIM locked, which prohibits using a SIM card from a different network operator.
  4. If possible, try your SIM card in another phone.