Here is Xiaomi Redmi K20 Official Firmware (stock ROM); Download the latest flash file for Redmi Go (Tiare). Operating system optimization, hang on logo or stuck logo only fix, boot loop fix, and dead after the flash fix, This firmware also helps to reset FRP Gmail bypass
There is another way to update your phone software for free, If the warranty on your phone is still running, then take it to the service center. And if you have your smartphone insured, then contact it
Note: Check the term condition of the insurance company first, because the insurance company does not accept the claim regarding software updates.
Android v9.0 (Pie)
PerformanceOcta core:2.2 GHz, Dual Core + 1.8 GHz Hexa Core
Snapdragon 7306 GB RAM
Mi Xiaomi Flash Tool: Get Link