HELP, I bought Blackberry used on eBay and I am having issue that I cannot seem to resolve. I installed the AT&T Sim Card and battery into my 7290 AT&T blackberry and when I power it up for the first time it just hangs at the power up process. I get only an hour glass and that is it. I did a hard reset of the device and no change. I tested it my other AT&T 7290 and when first powering up with a new card takes about a minute.... Does any body know how to resolve this or should I cut my losses? Please help!!!