If the phone won't turn on, ensure you have the exact hardware-matched firmware, as using the wrong file can permanently damage the bootloader.
Install the SPD USB Drivers on your PC to ensure the computer recognizes the phone. jazz digit 4g lite flash file spd
A common issue on SPD chipsets is losing IMEI numbers after a wrong flash. Flashing the correct modem file or using the flash tool to restore the NVRAM can fix network issues. If the phone won't turn on, ensure you
Click the "Load Packet" (gear icon) and select the downloaded .pac flash file. Connect Device: Turn off the phone. If the phone won't turn on