grant access to the baseband firmware where the IMEI resides. Most "IMEI changer" apps found on jailbreak repositories only change the number in the Settings app or when dialing , which is purely cosmetic. ZiPhone (Legacy)
Many users confuse jailbreaking with unlocking . Jailbreaking removes software restrictions, while unlocking (often through services like doctorSIM ) allows the device to work on different carriers. Why Changing an IMEI is Risky change imei iphone jailbreak
The baseband processor runs its own sealed operating system (separate from iOS). Apple and chip manufacturers (Qualcomm/Intel/MediaTek) have fused security layers. Writing to the IMEI requires from Apple or the chip manufacturer. A software tweak installed via Cydia cannot penetrate this hardware-level sandbox. grant access to the baseband firmware where the IMEI resides