my wifi won't turn on on my iphone 4s, how do I fix it?

What do you think if I restore my phone back to a 7 version of the OS, back when everything worked?

Sorry to be negative but I think this won't fix it. My phone wi-fi stopped working when IOS 7.1 was installed and I think the guys at Genius Bar would have cured it if the problem was with the software. It's worth a try though - gook luck!

Take your iphone out of the case. Turn off your iphone. Wrap it in a paper towel. Put in the freezer for 15 minutes. Take it out and turn it back on. Wifi should work. It worked for me.

Take your iphone out of the case. Turn off your iphone. Wrap it in a paper towel. Put in the freezer for 15 minutes. Take it out and turn it back on. Wifi should work. It worked for me.

I have seen this issue for awhile now. I have a fix for it may seem unconventional but it works and will fix it for good.

First step is to have a heat gun or blow dryer and heat the phone up till you see the Temp warning screen. Once you see that it shuts down all antennas in the device. Turn it off and let it cool all the way down. ( room temp) turn back on and enjoy using your wifi again. Hope it helps everyone

I did exactly what David Forgues said. Turned on Airplane Mode and shut down my phone. I waited only a minute or so and turned it back on.

I went into Settings and Turned WIFI back on which worked. After switching off Airplane Mode WIFI is still connected.

Thanks for the advise David.

I tried the "heating" fix, with a hairdryer. Didn't get to the stage of the Temp warning screen, but the phone got quite hot. Turned it off, and turned it on again when it had cooled - WiFi now works !! Had previously tried everything else (re-boots, updated to iOS 8.1.2, reset Network settings, Airplane mode before turning off etc). Nothing looked like it was even coming close to working.... I wanted to exhaust all avenues before wiping the phone, and hoping that that worked. Sometimes the unconventional fixes are all that you need. Thanks XxJQKERxX !!

Hello guys,

here is what worked for me : simply reseting the network setting.

This is where I picked up the info: iOS: Wi-Fi settings grayed out or dim - Apple Support

HOpe this will work for you as well!

All of a sudden, this happened to me tonight. I've been having some weird problems in iTunes, but nothing like this - WiFi and Bluetooth both failed tonight for no obvious reason.

I tried resetting network and phone settings, tried to update iOS but didn't have enough memory on my Mac to backup...was REALLY getting frustrated, til I found this thread. I tried the freezer trip (turn on Airplane mode, take iPhone 4S out of case, wrap in paper towel, put in freezer for 15 minutes, turn phone back on) - and it worked.

I have no idea of why this worked, but I'm grateful that it did.

I am grateful too, many thanks to the freezer tips.

Unbelievable, the freezer works. I tried it once for 15 mins but it didn't work so I put it back into the freezer with the airplane mode turned off, for another 5 mins and it worked!!!!!!!!!

Hi,

but tomorrow...not working !

I'll tell you what worked for me. I've posted something above but the day after, it stopped working. If you only do the freezer part, it will stop working a few days after also (well this is what happen for me). I've done the hairdryer part and the freezer 10 days ago, and it is still working. I hope it will continue to work...

Here is the link that describe the steps I followed: https://www.youtube.com/watch?v=brliKIdTECg

Good luck!

Hi caltatuc,

i will try

but shame on apple !!!!

Thank you

I tried all the tricks suggested here, none of which worked for me.

Did DFU also, did not help.

Do not know what to do with this phone without WIFI