Navigate to the menu and select the manual/local update option to select the file.
(model X6871) operates on a sophisticated firmware architecture designed for high-performance gaming, combining the MediaTek Dimensity 8200 Ultimate chipset with a dedicated Pixelworks X5 Turbo Firmware INFINIX GT 20 Pro
Never download firmware from random YouTube links or obscure forums. Many of these contain malware or modified Chinese bloatware. Navigate to the menu and select the manual/local