: Changing an IMEI to bypass a blacklist is a criminal offense in many countries. Legitimate use is generally restricted to restoring the original IMEI found on the device's sticker or box. Security Risks
Repairing IMEIs on keypad devices generally requires PC-based software capable of communicating with the device's chipset. Miracle Box / Miracle Thunder : A widely used professional tool for mobile unlocking and IMEI repair china keypad mobile imei repair tool
Originally for Android smartphones, but works perfectly for MediaTek feature phones when configured correctly. : Changing an IMEI to bypass a blacklist