[tinnot]

I got a T-mobile Blackberry Pearl off ebay last week and just got it unlocked from a vendor code I purchased. It worked fine with no SIm card in, and the unlock code said "code accepted." But now with my ATT SIM card in the phone goes through the startup process, says "verifying security software", then shuts down. When I turn it on it turns right back off again. Can anyone tell me what is going on and what to try? Thanks, I'm desperate here!

[mcontuzzi]

Tmobile devices are not compatable with att sim cards - the IMEI and PIN numbers do not correspond to one another... I would send the phone back.