Chosen Solution
After teardown for screen replacement, I’ve a problem of connection(s) with my iPhone. Except wifi, non other connection works : no gps, no gsm, no gps. At the begin, I was thinking that my problem come from the missing (blue) inductor who’s normally present on the bottom on the logic board (between silver and cooper connectors) and bridge it. But no change. Now I see that either bluetooth and gps signal are missing (functions work but no detection). Is there a part (broken or misplaced after tear down) who can explain all these ? Thanks, Patrick.
I had the same issue with a 4s last week. I went back and used 94% isoprophyl alcohol to clean the grounding contacts, etc, then put the parts back in using tweezers instead of my fingers. The wifi and cell reception jumped to 100%, better than when the phone was brought in for a screen replacement.
You probably have issues with the antenna.
