Maybe someone can help me with this. I purchased a 7290 from a third party that was locked to Cingular. T-Mobile helped me unlock it and set me up with service. The problem is that whenever I send an e-mail, the return address still shows up as the old owners Cingular address. There is no way to change this from the t-mobile website, nor is there any mention of how to change this in any of the user guides that I have. Another BB user at work says I might have to bite the bullitt and call t-mobile tech support and have them change it in their system. Does anyone know of an easy workaround for this.

The problem: your blackberry keeps old service book from Cingular that forces it to sign emails with old owner's address.

The easy workaround consists of two steps:

1. Delete service books on your blackberry.
2. Resend T-Mobile service book(s) to your blackberry.

After step 2 blackberry will only know about your email address.

You can search these forums on how to delete service books, and T-Mobile FAQ should have info on how to resend them.

Make sure you do not try step 1 until you are confident you know how to perform step 2.

I really don't mean to hijack, but ... How did TMO help you unlock a BB 7290 that was locked to Cingular?

When I originally explained my situation to T-Mobile, the rep at the store called tech support,filled out a request form and said as long as the 7290 was not reported stolen that they would e-mail me the unlock code within 24-48 hours. Two days later I received the unlock code in my e-mail. I walked back into the T-Mobile shop they plugged in the code, unlocked it, and set me up with service. The only thing I had to do was borrow a friends phone that uses Cingular. You need an active sim from cingular to unlock their phones. Otherwise TMO took care of the rest of it.

Thanks! That's great information. I didn't think one carrier could provide the unlock code for a phone that had been locked to another carrier.