Chosen Solution
I replaced my iPhone 6 battery a month or so ago, and ever since then my phone has been having trouble picking up wifi unless I’m very close (about 10 feet) away from the router. The wifi is not greyed out. I’ve also noticed some poor Bluetooth connectivity when I’m playing music in my car and so location issues with my Maps GPS since the battery replacement, but I don’t know if these issues are related
Sounds like you are having one of two issues. The first, and probabaly not likely is that the wifi antenna got unplugged or is failing. The second and more likely thing is that the wifi/Bluetooth chip on your motherboard is loosing its connection causing you to have a weak signal. In order to do this repair, you will have to micro solder a new chip onto your motherboard. Not the easiest of repairs that’s for sure, but can be done.
You probably need a new wifi antenna. It is a common issue. Sometime it could be that it got unplugged iPhone 6 Logic Board Antenna Flex Cable
I have the same issue after replacing my battery and it always ended every month extra charge for my data…
I had/have this same problem and after tearing into the phone to investigate, found that I had accidentally broken the wifi/bluetooth antenna connector (the S-curve piece that connects the antenna to the logic board). I imagine this is an easy accident to occur during a battery change, especially if the adhesive doesn’t off easily.
Same here! Genius Bar Replaced the battery and now poor WiFi. Coincidence? I think not!
