Ok first off i would like to say i just joined BBF i work for at&t and I've looked at this forum hundreds of times for various issues and just to see what's going on in the blackberry world. i recently won a blackberry 8310 directly from blackberry which makes my issue kind of a pain. ok so here's the issue.

right from the box i took it out put the sim card in, plugged it in (as they come with 1 batt bar) charged worked fine whatever... unplugged it, within 2 minutes it reset so.. I'm like whatever happened once no biggie, so then it does it again in about 10 minutes or less so I'm doing everything i can think of from re-installing OS to pulling batt for minutes at a time cant think of anything i do notice that as long as its plugged into my pc it works fine let me stress (THIS IS NOT A BATTERY ISSUE! so do not come back and tell me it is) if i have the signal turned off the phone will not reset, my blackberry rep tells me to do all the steps i have already done so there's no real help there, although i can do a little more work and go higher up in the chain im looking for a way to fix it my self first (let it be known i also have a 8110, 8300, and a 8703e{from sprint})

now with all that said what can we figure out?