How To Install Stock ROM on Eurostar Onyx 3 (Firmware/Unbrick/Unroot)
Guide To Install Official Stock ROM On Eurostar Onyx 3 (Back to stock, Unbrick, Unroot and Fix Bootloop): The available firmware file name is Eurostar_Onyx_3_M20_ES5515_MT6580_V5_V1.0.4_5.1.zip and it