Iphone 7 no network, looking for a network, attempting to update is the latest v

Hello.

The client abandoned me an Iphone 7 which had a network problem. After clearing the network settings, trying out several other cards, Iphone still couldn't find the network. Instead of a network name I had no network or I was looking for.
Because at the same time Iphone was calling for an update, I made an update. Well, not entirely because the update got stuck during hardware verification and showed an unknown error 3.
Guys, do you have any ideas?
Because in my opinion probably some IC from the network fell, so iTunes has a problem with hardware verification.

Thank you in advance for your answer.


Tomek

Odtwórz soft od zera i zobacz czy zwróći inny błąd.

Błąd 3 - Currently there are two progress error messages:
1. If error message appears after reboot to two thirds of
progress, mostly it is caused by baseband CPU physical
damage. 2. If error message appears in the case of reboot
to 99% of progress, it means EEPROM fails to cache, it
can be certain that EEPROM has faults

Hi.
Thank you for your answer.
I tried to play it in windows on imac and macbook with the latest itune. Unfortunately, everyone had the same problem, error 3 pops up during hardware verification. Today I will try to play it in linux and see what exactly it stops.

Thanks.

Thomas

Baseband, baseband eeprom. the phone has any stories?

The only story is a young woman with a dropped telephone and a broken screen. (and no network).
Everything leads to basebend. Ic power baseband or baseband itself.
I don't think it won't go without desoldering.
Thanks.

Added after 13 [minutes]:

I did restore, I have AMRestoreErrorDomain / fffffffffffffffff: failed to update device firmware ...... and many more.
Chip released.
IC exchange not avoided.


Added after 2 [minutes]:

What appeared