Chosen Solution

Hi, As the title says. We work in a shop and repair alot of iPhone 6.. This problem has come up from time to time and we have no idea why. Replacing the antennas never resolves it, and it always ends up with us having to buy a new phone. We’ve also reset the settings to no avail.

So changing Wifi/Bt IC doesn’t resolve the problem? Did you check vcc-main & 1.8v at wifi ic? is value standard after changing lcd?