Will Replacing The Upper Antenna Fix My Greyed Out Wi-Fi Issue?
I've got a iPhone 4S that is about a year and a half old, and I didn't buy Apple Care, so it no longer has a warranty. I recently updated to iOS 7 over the air via Wi-Fi, and as soon as the phone rebooted, the Wi-Fi option was greyed out. I've tried everything from resetting all the options, and even restoring it as a new phone. Nothing worked, so I took it to the Apple store. Of course they told me that my hardware was already on its way out, and the update probably just finally caused it to fail completely.
I knew from reading forums on Apple & iFixit, that this was probably due to a bad solder point. I got out the hair dryer and gave my phone a quick shot of hot air directed at the back of the phone near the headphone jack. Immediately the iPhones Wi-Fi was fixed. Of course the fix was only temporary (about 5 minutes), but it confirmed that it is indeed a bad solder point.
I've read about more permanent solutions including reflowing the solder using a heat gun or a baking the PCB in the oven. Neither of these solutions seem ideal, so I looked around iFixit, and see they have a upper antenna assembly for $15. I know this controls the Wi-Fi and Bluetooth, but when I emailed iFixit to confirm this would fix my problem, they told me it may also be directly related to the logic board.
I'm wondering if anyone knows where the bad solder point is on the phone that is causing the greyed out Wi-Fi issue. Is there a chipset on the logic board that's causing it, or is it somewhere on the Wi-Fi/Bluetooth antenna?
Has anyone with this issue replaced the upper antenna and have it fix the problem? Does anyone know where the most common bad solder point is (Wi-Fi/Bluetooth antenna or logic board)? I'd rather replace the upper antenna than to have to reflow the PCB.
Any help I receive would be greatly appreciated. I'll also keep this post up to date to help anyone else who's having the same issue.
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