uses a chipset, so you must use specific tools designed for this hardware:
Flashing will completely wipe all personal information from your phone’s internal memory. nokia g21 flash tool full
Download the firmware and the SPD Flash Tool. Extract both zip packages onto your computer. uses a chipset, so you must use specific
The tool should detect the device and automatically begin the flashing process. uses a chipset
Hold the button and connect your phone to the PC via USB cable.