ios 15.1
All iPhone models work worldwide, meaning you can use your iPhone almost anywhere. International roaming is possible for all GSM and CDMA customers, no matter where you live. If your iPhone was financed with a wireless carrier, they can verify your ability to roam internationally.
The iPhone Upgrade Program allows you to upgrade your iPhone to the latest model. It also comes with AppleCare+, which offers security and protection.
Quick Start can help you restore your content and data to your iPhone using your iCloud backup.