Basic troubleshooting steps clearly outlined in the User Guide are restart, reset, restore from backup, restore as new device.
Have you tried ALL the troubleshooting steps? If you have and you're still having problems, then you'll need to bring your phone into Apple for evaluation and possible exchange.
My 3GS was working perfectly, but the 3.1.1 update seems to have ruined it. Reset doesn't work (Apple logo never comes up) and restore appears to work based on what iTunes says, but the 3GS just has a white screen after the process. Reset just makes it seem dead. Repeated restores just repeat the process.
Will Apple really spend time with it, when it's long past any warranty coverage?
Wow, why would you want to be so snippy, even at the expense of being correct? This phone has never been jailbroken, nor have I ever attempted to jailbreak any of the iDevices I own, simply because I do not want to experience hassles.
One thing I will add is, this device has been replaced by a 4S, so it is no longer used with a mobile plan. I can't see why that would make a difference, but who knows, perhaps there is a reason.
I'm hoping for help or to see if other people are having similar problems, so I can either fix the problem, or else determine it's somewhat pervasive. Snipsters who like to cause problems and point fingers, please move along. I like to think people post here to ask for help and give help, but clearly, some have other agendas.
I've given you the suggestions that Apple recommends: restart, reset, restore from backup, restore as new.
If you're still having problems, perhaps your phone is experiencing a hardware failure. Make an appointment with the Genius Bar and bring it in for evaluation. There's really nothing we or Apple can recommend.
So Apple will work on an old out-of-warranty phone? I had no idea...
Thanks for your advice!
Note that I think it would be a huge coincidence that a hardware failure happened to occure during the few minutes of an iOS update, and since the problem doesn't seem perfavisve, I would guess it's more likely that some data corruption occured during the update process, and that left the device in an odd state.
I was thinking of searching for ways to go back to an earlier iOS (haven't had a chance to search yet) and trying to see if that yields different results after a restore. Sadly, the device probably isn't worth all the time I'm spending trying to recessitate it! What was I supposed to get done this afternoon?