Phone Shut Down Caused By WiFi?
I'm having a strange problem with my 3GS. It started when I was on vacation the end of August. My phone shut down, off, and I had to power it back up several times before it would stay on. Then it was fine for a week or so.
I work on a university campus that has a wifi network that covers all the university buildings on campus. It is fairly strong; you can connect to it from quite a distance away when walking outside or even driving. I actually work in a hospital that is located on campus, that has its own separate public wifi network.
So several weeks ago I noticed that when I would walk out of the building my phone would shut off. This began happening almost every time I left work. Then my phone started shutting off as I would be walking toward my building. (Typically I'd be walking in from the parking ramp, reading FaceBook or e-mail or whatever on 3G).
First I updated to the newest IOS version. This did not solve my problem. Then I began to wonder if the shut-down had anything to do with interfacing with the university wifi. So I started turning wifi off before I came in range of that network. This keeps my phone from shutting off about 50% of the time. The only thing that will keep the phone from shutting down when entering or leaving the wifi zone is turning off wifi and putting the phone to sleep by pushing the power button- not a complete shut off, just sleeping.
I'm trying to make it until the iPhone 5 is announced and I decide to wait for the 5 or buy a new 4, but this is getting really old. For example, this morning, I parked in the ramp. Wifi had been shut off since leaving my house. I started walking in, but when I got close to the first university building I had to pass, the phone shut off completely. So I power it back on, that takes a minute, as soon as I slide the unlock slider it shuts down again. This cycle repeats itself until I have walked through the entrance to my building, across the border from the university wifi to the hospital wifi (it's a separate but connected building). Only then will my phone start up and stay on, be put into Airplane mode (because I'm underground and can't get cell) and then I turn on wifi and it connects to the hospital network and everything is fine. Until I walk out the other side of the building, through a university zone, to get to a restaurant that has university wifi...
Any ideas, or do I just have to put up with it until I change phones? This is a new problem, beginning in August of this year, and I have been working in the same place with the same phone with no problems for the previous ~two years, updating the IOS frequently. Thank you.