Firmware modem iPhone 7
How to fix firmware modem
I believe the firmware modem is corrupted on my iPhone 7; the phone is in a perpetual search for a signal; I can’t receive or make calls
2 replies
I am not sure what you mean by Firmware Modem.
The link on top of this page, under the "Related Article” is the process. If that link did not help then please mention the exact difficulty faced by you.
Firmware modem iPhone 7