Live in Chicago, on AT&T. My 3GS is sitting next to me, hasn't moved. The signal(s) bars go from full, to none, to full, to none - all within like 5 minutes - is this normal? Is it just ATT or is my phone funky?
Do you happen to have the tethering hack? I had it and it caused my phone to do the same thing. And I would also go from 3G full bars to edge no bars.
It could also be ATT doing an upgrade to the system or the phone. Does it do this everywhere or just at home?
I jailbroke and un-jailboke so many times I lost track. I needed it, then it wasn't worth it, and so on. as of now, I have it un-JB with no tethering hack. this usually happens at home, at least I think so.