Here is Oppo Realme 1 Official Firmware (stock ROM), Download the latest flash file for Oppo Realme 1. 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.
Oppo Realme 1 CPH1861EX Firmware: Google drive