The steps can vary significantly depending on the specific method and tools you're using. Below is a very general outline:

The Lenovo TB8504X is a resilient device, but its security architecture makes IMEI repair a challenge. The keyword is not just a search query – it’s a roadmap to bypassing those restrictions. Whether you use a patched Download Agent, a patched Maui META database, or a customized SN Write Tool, the principle is the same: override Lenovo’s write protection .

: To unbrick or flash firmware, the QFIL (Qualcomm Flash Image Loader) is the standard utility for this specific hardware.

: The standard Qualcomm service suite used for flashing and backing up QCN files.

Known for an efficient "Repair IMEI" function that restores lost or damaged identification numbers.

Your tablet’s preloader version is newer than the patched DA. You need a Bypass Utility (e.g., MTK Bypass Ultra) to disable SLA/DAA protection first, then load the patched DA.