The Xiaomi POCO F3 official firmware on this page will assist you upgrade your phone MIUI variation to the most recent. To move from Beta to Stable ROM (vice versa) or un-brick your phone, you require Fastboot ROM.
If you formerly rooted or customized the system partition of your phone, you ought to think about flashing the Fastboot ROM. It will overwrite all existing modified system files to replace with factory software. To ensure that all important information on the phone (like contacts, messages, app data, and so on) is safe, back them all up because you might loose data after flashing.
Again, charge the phone to a minimum of 30% so that the flashing process will not be disrupted by low battery. Interrupting the firmware setup implies bricking your phone.
Download either the fastboot or healing firmware from the link( s) below and follow the suggested flashing directions immediately after the download choices. Do not think twice to report any broken links detected.
Xiaomi POCO F3 official Fastboot ROM
Xiaomi POCO F3 Recovery ROM (local update)
Important! Always backup existing firmware before flashing any firmware.
How to flash Xiaomi firmware
After downloading the firmware from above link, get a functional USB cable television, then follow the directions through this link to find out how to flash Xiaomi Fastboot and Recovery firmware.
If you have any concerns or other contribution please post in remarks section for help.