I have an iPhone7 A1778 purchased in Canada.

If the only logic boards available (above) are the AT&T and T-Mobile, which should I choose or does it not matter?

Would replacing the logic board work just as well ?

Holy moly, you guys are on a whole other level !!!!

Wow! Thank you Scott.

That was maximum difficulty. It actually took me 3 hours hahaha.

So much fun. It didn't solve my non-functioning mic problem unfortunately.

My 7 is running perfectly except that. And it stopped functioning after the iOS 15 update.

Best

iLex

Perfect, thank you

Do not try to pull the plug off the circuit board as it's soldered. Pull the cable sideways out of the socket.