Unisoc Imei Repair Tool -

Unisoc IMEI repair tool is a specialized software utility used to restore or fix the International Mobile Equipment Identity (IMEI) number on devices powered by Unisoc (formerly Spreadtrum) chipsets. These tools are essential for resolving issues such as "Invalid IMEI," "Null IMEI," or network signal loss that can occur after a software crash, incorrect firmware flash, or rooting. Popular Unisoc IMEI Repair Tools (2026)

3. NVRAM Rebuilding via Backup

If you have a full scatter firmware backup taken before the corruption, you can restore the nvram and nvdata partitions using SP Flash Tool (the Mediatek tool, ironically, also works on Unisoc with the right scatter). This reverts the phone to its factory state.

: Power off the phone. Hold the specific "Boot Key" (usually Volume Down or Volume Up) and connect it to the PC via USB.

iReverse Unisoc Ultimate Tool: A free utility that handles FRP (Factory Reset Protection) removal, flashing, and IMEI repair.  General Repair Process 

6. Effectiveness

• For null IMEI after flashing: High success rate (70–90%) when using the original calibration file (.nvram or .bin) from a full firmware package.
• For permanent repair: If the baseband or security partition (persist, nvdata) is physically damaged, the tool will fail.
• Newer Unisoc T-series (T606/T616/T618/T700): Many tools fail because of enhanced secure NVRAM with RSA signature checking.