: If your device is stuck in a boot loop or shows a black screen, "flashing" the original carrier-specific firmware is often the only way to restore it to a working state.
: Firmware updates often include the latest Android security patches that close vulnerabilities used for bypassing FRP. End of Life (EOL) lm-k500um firmware
Flashing firmware can erase all data. Backup your phone if possible. : If your device is stuck in a