The suffixes are important. NWD usually indicates a standard public version, while TL , SPDZ , or UP often point to variants made for specific suppliers or with minor hardware differences. You generally need firmware built for your exact prefix (e.g., K2001N_NWD ).
If your touch inputs are inverted or unresponsive after booting up, place five fingers on the screen simultaneously for 5 seconds. This forces the factory touchscreen calibration menu to open. Follow the on-screen crosshair prompts to fix alignment. Access Factory Settings k2001n firmware update android 10 2021
Need help checking your current firmware version or MCU? Reply with a photo of your “About Device” screen. The suffixes are important