Hold the button and connect it to your PC via USB.
The official firmware is primarily used to unbrick devices from bootloops, fix software hang issues, or bypass security locks. This device uses the Unisoc (SPD) chipset, so flashing requires specific tools like the SPD Upgrade Tool or SPD Research Tool , rather than the SP Flash Tool typically used for MediaTek chips. Firmware Details & Prerequisites Device Model: Realme C21-Y (RMX3263) Chipset: Unisoc (Spreadtrum) File Type: PAC file (official firmware format for Unisoc) Tools Required: SPD Upgrade Tool or Research Tool Realme/Unisoc USB Drivers Original USB data cable Unbricking & Flashing Guide Realme C21-Y RMX3263 Firmware Official Unbrick,...
: Install the necessary Unisoc USB Drivers on your PC to ensure the device is recognized in "Download Mode". Hold the button and connect it to your PC via USB
