You must use the original IMEI printed on the tablet's retail box or its back sticker. Changing an IMEI to one not original to the device is illegal in many regions. Step-by-Step Recovery Process
You must enable the diagnostic port on the device, often via a secret code in the dialer or through ADB commands. Firmware: A copy of the original stock firmware lenovo tb8504x imei repair patched
The (or "Patch IMEI") function is executed via service software to bypass these security checks and authorize the new IMEI on the modem. Important Notes You must use the original IMEI printed on
: To "patch" or repair the IMEI, the existing (corrupted) security data is often wiped using a service tool to allow the writing of new parameters. Write New QCN/IMEI lenovo tb8504x imei repair patched