Technically, —not in the way most people imagine. On modern iPhones, the IMEI is hard-coded into the device's NVRAM (Non-Volatile RAM) within the baseband firmware. Jailbreaking primarily modifies the iOS software layer to allow third-party apps and customization; it does not typically grant write access to the secure hardware chips where the IMEI is stored.
You download an ".ipa" or a Windows executable. You connect your iPhone. The software asks for root access. Instead of changing the IMEI, it locks your files and demands Bitcoin. change imei iphone jailbreak
When a phone is reported stolen, carriers share the IMEI with a global database. If your phone has a "bad" IMEI, your SIM card will be rejected, and you will see "No Service" or "SIM Not Supported." Technically, —not in the way most people imagine
A jailbreak gives you access to the root directory, which some advanced tools use to "patch" how the OS interacts with the baseband. You download an "
Older tools like ZiPhone (compatible with iPhone 2G, 3G, and some 4 models) claimed to change IMEIs, but these methods are obsolete for any device released in the last decade. The Role of Jailbreaking in "IMEI Repair"