Follow these instructions precisely to re-install the factory firmware on your Nokia G21. Step 1: Install the USB Drivers

Ensure the firmware matches your geographic region to avoid network lock issues. 3. Unisoc (SPD) USB Drivers

Browse your computer, select the Nokia G21 stock firmware .pac file, and click .

Now that you have downloaded and installed the Nokia G21 Flash Tool, it's time to use it. Here are the steps:

Your Windows PC cannot communicate with the Nokia G21 without the correct drivers. For Unisoc devices, you need the (often included in the SPD Research Tool folder). Without this, when you connect the phone, it will disconnect instantly or show as an "Unknown Device."

Modern Unisoc USB drivers (v4.0 or higher) for Windows 10/11.

| Feature | Factory Reset (Recovery) | Nokia G21 Flash Tool Full | | :--- | :--- | :--- | | | No (Viruses in System partition remain) | Yes (System partition rewritten) | | Fixes Boot Loop | Maybe (if cache issue) | Yes (100% fix) | | Removes FRP Lock | No | Yes | | Fixes IMEI corruption | No | Yes (if using complete backup) | | Time Required | 3 minutes | 15 minutes |