The Fairphone 1 is compatible with a Mini SIM card (2FF)(ID-000 format), sized: 25mm x 15mm x 0.76mm. If you have a nano or Micro SIM card, ask your provider for a Mini SIM.
If you have a micro SIM card, it is possible to use a SIM adapter but we do recommend contacting your provider to get a new SIM card in the right size to prevent issues.
The Fairphone 2 is compatible with a Micro SIM card (3FF)(ID-000 format), sized: 15mm x 12mm x 0.76mm. If you have a nano SIM card, please do not use a SIM adaptor in Fairphone 2, since there is a risk of causing damage to the SIM connectors of the phone. Also, please don't use a SIM card which has been cut in an electronics store (or at home) to the size of a Mini SIM. Always ask your provider for a new SIM-card!
Your Fairphone has Dual SIM, that means that you can use two SIM cards at the same time.
Important note: you need to remove your battery before inserting your SIM card(s). You should also check and make sure your SIM card is the same width as the SIM slot. If it is not, then it is not the right SIM size and you need to find an alternative. Also, some older sim cards (older than 1,5 years old) can cause problems a newer phones. If you experience problems with the reception of the phone (calls hanging up, missed calls), or the call quality is below par, we recommend you to get a new sim card from your provider. Most of the times you can get one for free.
Standard Mini SIM, Micro SIM and a Nano SIM: