That's a tricky one. We recommend that you visit the official website of the phone manufacturer (Apple, Samsung, Nokia, etc.), where you can confirm the compatible SIM format for the phone concerned.
- Additionally, phones are always delivered without SIM cards so you'll need to contact a mobile network to get hold of one.
To find out if your SIM card / mobile plan will be compatible with a phone sold on Back Market, we recommend you speak to your phone network provider to find out if the SIM card you have will be compatible with the phone you want.