Chosen Solution
I have repaired numerous iPhone until now, but this problem occurred the first time. After replacing the screen everything worked fine, except it did not get any reception. It only said “Searching…”. So after some research and trying different fixes that did not help I removed the battery connector bracket (this thing: iPhone 6 Battery Connector Bracket). And voilà it worked again. After replacing the bracket it dropped signal again though. I did some testing by removing and reinstalling again and by now the signal seems stable with the bracket installed. I couldn’t find anything in Google about this issue. So I just want to make sure that when I had the phone back to it’s owner it will not drop signal in a week or so. Has this happened to anyone else and hows of a fix for this? Would be highly thankful!!
This is a common issue with the iPhone 6, when the phone will show searching do a quick check of IMEI with the *#06# , if you see the imei number the problem comes from the antenna if nothing shows you have a motherboard problem and there is a more complicated repair to do.
