If your UMIDIGI A3X phone is corrupt or bricked. Download UMIDIGI A3X stock firmware from here. To get it back to a working condition again. 

All you have to do is simply download the below-given UMIDIGI A3X firmware files and tools on your PC. And then follow the given instruction to install the Stock ROM on UMIDIGI A3X using SP Flash Tool. This guide is also helpful to unroot. Or fix any software malfunctioning problem. 

How To Flash UMIDIGI A3X Stock ROM:

There are various reasons to flash (Firmware on UMIDIGI A3X).

For example, your phone will be stuck or hang on the logo. You want to remove the FRP lock from it.  If you’re going to hard reset your phone and cannot access the recovery menu. But most of the problems and benefits that cause flashing stock ROM are below.