You must install the Spreadtrum/Unisoc USB Drivers on your PC so it can recognize the phone in "Download Mode."
: Obtain the Nokia C20 (TA-1352) stock ROM (.PAC file) and the SPD Upgrade Tool. ResearchDownload.exe , click the Gear (Load Packet) icon, and select your .PAC file. Start Process : Click the Play (Start Downloading) Connect Device : Power off the phone completely. Hold the Volume Down (or both volume buttons) and connect it to your PC via USB. Completion nokia ta1352 pac file link
: Turn off the device and hold Volume Down + Power to enter Fastboot, which is useful for basic diagnostic commands via a PC. Important Precautions You must install the Spreadtrum/Unisoc USB Drivers on
Hold (or sometimes Volume Up + Down) and connect the USB cable to the PC. Hold the Volume Down (or both volume buttons)
This file contains the complete software suite of the phone, including: