WiFi greyed out after iOS upgrade
I believe it's obvious that upgrading the iOS messes with your WiFi.
Let's focus on the iPhone 3Gs and iOS 4.1 upgrade. It's a fact that if you search the Internet - iPhone 3GS WiFi grayed out after 4.1 upgrade - you will find thousands of results.
Besides the thousands of iPhone owners reporting issues with WiFi after upgrading the iOS, I recently witness 2 (two) iPhones 3GS on 4.0.1 upgraded to 4.1 and ending with the WiFi GRAYED OUT. Mind you, EVERYTHING was working fine BEFORE the upgrade.
More information: the WiFi is grayed out, no address in Settings>General>About ; Bluetooth doesn't turn on, but it has an address in Settings>General>About; battery drains out 2 times faster.
I was stunned by this weird behavior. So I got another iPhone 3GS on 4.0.1 - no way I'm going to update this one! I removed the motherboards from the 3 iPhones and tested the all WiFi hardware with all motherboards.
The results: the iPhone 3GS 4.0.1 works 100% with all WiFi hardware; the other two iPhones 3GS, recently upgraded to 4.1, always had the WiFi option GRAYED OUT no matter which WiFi I used.
Obviously, we must consider that not all non-working WiFi scenarios are related to an iOS upgrade. But we CANNOT IGNORE that there is considerably high chance you will loose your WiFi and battery power after you upgrade the iOS - I've witnessed exactly that!
Meanwhile, I've tried all the following solutions to fix the WiFi, without any success:
- reset networks settings (several times)
- erase all content and settings (several times)
- continuous reset the iPhone (power+home buttons)
- restore the firmware in restore mode (several times)
- restore the firmware in DFU mode (several times)
- upgrade the firmware to 4.2 and downgrade to 4.1 (to check if modem upgrade could fix it)
Never tried the crazy "cook the motherboard" option, but I doubt it will work because I believe the problem is with the iOS upgrade, not hardware. Also, never tried the iRecovery solution because it doesn't work with my 64-bit OS.
Apple should definitely release some kind of software for Mac and Windows to fix this terrible flaw. The WiFi issue after iOS upgrade is just too obvious to be ignored! And considering the price of the equipment, iPhone users deserve a competent technical support - and solutions!
Any support would be greatly appreciated.
Best regards.
iPhone 3GS, iOS 4