i have a problem with my blacberry 7290 from tmobile where it will reboot unexpectedly.i upgraded the software and my battery connection is firm.i have taken the battery out and put it back in but to no avail.???

How long have you had your device? We have a few of those from my company - unfortunately they're all out of warranty.

Unfortunate to say but i bought it used .a friend of mine who's a blackberry administrator told me to let the battery drain and then charge it.but i doubt it's going to work.i'm thinking it's a software issue but then again i could be wrong.

try reloading with the latest software.

Oddly it just stopped happening. I can't explain why it started and why it stopped. But I've had the unit for over a year and re-boot issue rarely happens. I've done nothing different.