How To Install Stock ROM on Ryte U55 (Firmware/Unbrick/Unroot)
Guide To Install Official Stock ROM On Ryte U55 (Back to stock, Unbrick, Unroot and Fix Bootloop): The available firmware file name is Ryte_U55_MT6580_20180414_5.1.zip and it is 540 MB in size. The Firmware is only compatible with the MediaTek MT6580