after upgrade my iPhone 4S to iOS 7.1 I have no Wifi, after wake up from sleep!!

UPDATE

I was able to fix this issue with my 3 iphones by simply re-booting my router. After it came back online, the phones connected normally and performing at normal speeds.

Strange that the 7.1 update required me to do this?

I'm still bying a Samsung phone next time.

A reboot of your router fixed the issue, which shows that the problem existed in your router, but somehow the iPhone is to blame?

That's like saying that your DVD wouldn't play in your DVD player until you turned off the DVD player and turned it back on, and then blaming the DVD, not the DVD player.

There was not a problem with the router. I have several other non-apple devices (wired and wireless) connected to my router which still worked perfectly fine before the reboot. The issue was exclusively with the iphones post 7.1 update.

I find it strange that only my apple devices stopped working on wifi after the 7.1 update.

Same issue with my iPod Touch 5g. Dead in the water with an internet connection. NOT HAPPY!

to Collardgreen - Tried all your suggestions. Nothing worked.

I too have just started having this problem with my 4s after updating to the newest firmware (7.1). I spent about 7 hours yesterday, trying all of the solutions presented on this problem.

I have come to the realization that this has got to be a Firmware Update caused problem. My Wife, Luckily hasn't updated her 4s.

We have 2 iPod touch 3rd gen., 1 iPhone 3GS , 2 iPhone 4s, and 2 iPad 4. My 4s is the only device that was updated, and now my iPhone is the only Device that the Wifi won't connect to the Network.

I'm very Frustrated right now, and want a solution to this problem...sooner, rather than later.

Same problem here on iPhone 5 with iOS 7.1. All the suggestions about restarting routers and phones can make it appear to be fixed but it's not long before the trouble staying connected begins again. Other wireless devices on the router are not having any problems, this is an iPhone/iOS problem and it needs to be addressed soon. Losing Wi-Fi connection when the device is sleeping/idle is completely unacceptable.

i have same issues on both my ipad 7.1 and i phone 5s please help i cant use my devices they are both have wifi issues and screen flicker when the sceen is on i have restore both and reset and this just made the issues worst than before please fix this

I had the same problem in January. I recently had a genius bar meeting and they said that it would be $200 for a replacement.

I have the same issue. Iphone 4S: Wifi button grey. WiFi not available after installation of iOS 7.1 on a flawless working phone. The iOS update has ruined my iphone 4S !! The rest of our ipdas and iphone 5 has survived update.. A fix for the 4S users is urgently needed Apple !!

As a follow-up: On Monday, April 24, I came to work and had no problems accessing the campus (UCLA) wi-fi. When I got home that evening, lo and behold, I had no problem with my home wi-fi. HOWEVER, this morning when I got up, the connectivity was LOST AGAIN!!! But when I got back to work, no problem. Sounds like the problem is squarely in Apple's court with iOS 7.1. Let's hope that they fix it sooner rather than later!

FOUND A WORK-AROUND!!!

My iPhone 5s and iPad 2 both have iTunes Wi-Fi Sync enabled. I think this is where the problem is occuring. The 5s works fine at 7.1 with IWS enabled, however the iPad doesnt, so what I did is simply turn off the wifi on the iPad 2 an quit itunes and reopen it, and tada!!! iPad is now showing on iTunes.

I dont know if this will work on windows, but this does work on iTunes 11.5 on Mavericks.

After a week long attempts on resetting my phone, reset network settings, keeping my phone in the freezer and heating my phone with a hair dryer finally my wifi works..

Mtblewis wrote:

There was not a problem with the router. I have several other non-apple devices (wired and wireless) connected to my router which still worked perfectly fine before the reboot. The issue was exclusively with the iphones post 7.1 update.

I find it strange that only my apple devices stopped working on wifi after the 7.1 update.

No, the problem was with your router.

1. Your iPhone would not connect to your home wi-fi.

2. You rebooted your home w-fi router.

3. Your iPhone now connects to your home wi-fi.

This means the issue was with your router understanding the new protocols (or 'language') of the iOS 7.1 device. Sometimes it means you need to update the firmware of your router. And some routers have problems recognizing a 'old' device properly when it starts running a 'new' operating system. In other words, your router got confused, and rebooting it 'cleared it's head'.

Correct me if I am wrong but you seem to be saying that it is incumbent upon router manufacturers to accomodate some proprietary communication protocols implemented by Apple in iOS 7.1. My router is less than one year old and supports the most widely implemented Wi-Fi protocols defined by IEEE 802.11 so perhaps I'm a bit silly but I feel that I should NOT have to restart my router daily in order for my iOS device to talk to it. I respectfully disagree with your assessment -- It's an iOS problem regardless whether rebooting my router fixes it temporarily because ALL of the other IEEE 802.11 compliant devices in my home have no problem whatsoever with my router.