Just thought it might be of help,I have a 3GS which was working fine, un til I upgraded to IOS5 I then had random connectivity issues despite trying everything, I finally got an appointment at the genius bar, they couldnt find anything wrong, what fixed it was going back to a pre- IOS5 backup. I.e restore the phone to an old backup, yes I lost some data, photos and the like, althouhg likely i back up regulary, so it was not so bad, no problems now thouhg, its almost certainly an issue with the SW.
Same story for me.
Have an iPhone 3 GS, almost 2 years old. Never had serious troubles besides the alarm bug...
Was so happy I bought an Ipad and Ipad2 recently.
But now, since iOS 5 I cannot connect on WIFI anymore.
Tried all tricks I found on forums, even thought it was my router.
No reset, resync, etc worked. And I cannot downgrade to iOS4 for a stupid reason.
I store my backups on ICloud but I cannot access it with iTunes, at least my iPhone says this... he needs WIFI he says.. and that's just te problem. No WIFI for me !
I found the text below on a forum : This looks a lot about our problem but... it was already in 2009 with the 2G...
I Have Absolutely Positively Found What The Wifi Problem Is With The 2G iPhones. The Battery!. When The Battery Life Has Dropped. Wifi Will Not Work If Your Battery Life Is Higher? Than 50% I Thought This Was B.S. Until I Tried It. If You Have An Actual App That Allows You To See Your Battery Percentage, It's Been Proven. I Charged My Battery To Full Power Just To Put What I Found Out To Test. My Battery Was At 90%. My Wifi Went In An Out Constantly, Never Staying On More Than 10sec. The Second It Hit 50% Wifi Came Back Instantly, Never Disappearing Again.
So What's Been Happening Is When You Restore It, It Resets Your iPhone Momentarily. But As Soon As That Extra Boost Of Battery Life Goes Away....Back To The Same Ole Wifiless iPhone.
To Apple-Tech :
My iPhone always drops his ipadres and comes with a new one. But the strange thing is he gets a ip adres in another range specified in my router ? The iPads are collecting an Ip-adres in the correct range... the iPhone gets one out of the blue...
Any update from someone ?
Yesterday I had a look into my Router/Wifi access point.
Disabled security/encryption but all devices connected except... the iPhone 3GS.
Router had latest firmware installed.
When I check the router monitoring software I saw that the 3GS connects to the router, and after 60 seconds the connection is dropped and he reconnects again. But the ip adres the iPhone gets is not within the DHCP range.
thats probably why the phone cannot connect to the internet.