If your phone is an iPhone 4 (model A1349) it is a CDMA phone, not a GSM phone.
-
That means it doesn’t use a SIM card. It is locked to the one service provider
+
That means it doesn’t use a SIM card. It is locked to the one service provider. The necessary information is coded in the phone and not provided by a SIM card as in GSM phones
Here’s a [https://www.whistleout.com/CellPhones/Guides/BYO-phones-how-to-take-your-phone-to-another-carrier|link] that shows the options if you are in the USA and have a CDMA phone and wish to change service providers.
Hi @ mariancooke,
If your phone is an iPhone 4 (model A1349) it is a CDMA phone, not a GSM phone.
That means it doesn’t use a SIM card. It is locked to the one service provider
Here’s a [https://www.whistleout.com/CellPhones/Guides/BYO-phones-how-to-take-your-phone-to-another-carrier|link] that shows the options if you are in the USA and have a CDMA phone and wish to change service providers.