Your iPhone has the same reset process whether it uses a SIM card or is designed for CDMA networks. Even if no SIM card is in the device, you can reset the iOS software normally; apps and functions that require mobile service won’t work until the SIM card is in the phone, but the iOS software will still work normally. Add a SIM card before or after resetting the iPhone to connect to your provider’s network. Restoring your phone in iTunes returns your apps, media and personal information to your device once the new copy of iOS is installed. Before starting the restoration process, back up your iPhone with iTunes so that your latest data and settings can be saved to your iPhone after the reset is complete. Tips Warnings Writer Bio
