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iPhone 6+ Greyed out wifi after touch IC repair Blutooth works
Did Touch IC repair on an iPhone 6+ with M1 jumper and everything works great with the phone, except the wifi is greyed out, I've tried a new wifi antenna already no dice, was thinking wifi IC but the Bluetooth works and they're ran through the wifi IC together so you'd think bluetooth would stop working if it was Wifi IC correct? Wifi is the only thing on the phone that doesn't work, pop my sim in and it connects to data makes calls and texts etc. I've removed and reballed C5201_RF already and that didn't fix it still same thing, blutooth works perfectly.
Gosh, I've never truly been able to solve this issue after a touch ic repair. Usually, if you wait long enough, then it will come back. If it doesn't come back, then I would recommend trying to do an IOS update because this problem stopped happening after ios 11. What ios version is your phone on? My guess is that there is some sort of software based sensor that detects heat, which disables the wifi, which maybe why after ios 11, this doesn't happen as often anymore.
If it's still happening, then I would recommend doing a diode mode on all of the wifi pads that you can access, then comparing them to that of a known good board. Keep in mind that a reading like 0.50V is not the same as 0.54V, so keep a close eye on the diode mode readings.
Which way were you directing the heat with your rework station?
It's been about 2 weeks since the repair so I don't think it's that, I will do a flash with 3u I was not as cautious with the air flow as I could have been so it is quite possible that it was hitting the wifi IC a little, this was my first ever touch IC repair so everything working but wifi seems like a partial win regardless but I'd like to sell this phone if possible.
Wifi problems are tricky. Something that I've never really been able to figure out. We don't repair grayed out wifi for this reason.
If I were to troubleshoot the problem though, I would start with doing a diode mode reading with all known points around the wifi IC and comparing them to that of a known good board. It could be something as simple as one dead wifi to cpu line that is causing the grayed out wifi problem. Since it happened after a touch IC repair, you can kind of isolate an area for where to look first...so, I would start near the bottom of the wifi chip and on the other side of the logic board.
Sorry that I can't be of more help, but I've spent way too much time trying to track down wifi problems already.