Before attempting to flash any firmware, you must identify the actual chipset inside the device. Clones often "fake" their specifications in the Settings menu to show high-end Snapdragon chips when they actually use low-cost MediaTek processors. Chipset Identification : Use third-party apps like Device Info HW
The most comprehensive database for MTK-based "copy" phones. Search for "S21 Ultra" plus your specific MTK model number. s21 ultra clone firmware
If your clone is bricked, and you have the exact matching firmware from the seller, you have a 50/50 chance of revival. If you’re just annoyed by bloatware, do a factory reset in recovery (usually Volume Up + Power) and debloat via ADB. Before attempting to flash any firmware, you must
A genuine used S21 Ultra now costs $350–$450. The time you’ve spent hunting for clone firmware is worth more than that. Flashing clones is a rabbit hole of driver errors, boot loops, and malware. Search for "S21 Ultra" plus your specific MTK model number
The only legitimate reason to flash clone firmware is to:
If the phone boots but has a black screen (backlight but no image), the LCM driver is wrong. You will need to repack the firmware with the correct display driver—a process beyond normal users.