While a blank modem firmware field often points toward a hardware failure, there are several software-based troubleshooting steps you should try first before seeking a professional repair.
Do not let a shop reheat the chip without reballing. "Reflowing" with a heat gun is temporary (lasts weeks) and often damages surrounding components. modem firmware iphone missing
If the restore fails with error code -1 , -3 , or 53 at the “Waiting for iPhone” stage, it confirms the baseband hardware is dead. While a blank modem firmware field often points