Nokia C20 Flash Tool ((link)) -

for MediaTek processors, the Nokia C20 (TA-1352/TA-1356) typically features a Unisoc (Spreadtrum) chipset, requiring tools like the SPD Flash Tool (SPD Upgrade Tool) or specialized modules like Cheetah Tool Pro Key Features of Nokia C20 Flashing Tools Download SP Flash Tool for Nokia phones

Depending on your technical comfort level and specific device variant, different utilities may be used: nokia c20 flash tool

Official Nokia firmware is not publicly hosted by the manufacturer. Technicians must rely on third-party repositories. Let us know which tool worked for you in the comments below

Before starting, ensure you have the following ready to prevent permanent bricking: for MediaTek processors

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Let us know which tool worked for you in the comments below. And remember: Always back up your NV-data (IMEI) before you flash.