[ChesterJT]

I have an unlocked Pearl and borrowed a friend's T-Mobile sim card to try the install that way. When I turn on the Pearl it loads up fine, however it says data connection refused and I cannot get online to even attemp to downloam Y!M. Any suggestions? I assumed when it loaded up with the different sim it would automatically setup the network. My friend thinks she does have a data plan (non-blackberry though) but even if she didn't shouldn't it at least let me use the MediaNet browser on GPRS? I also changed the APN settings to T-mobile's network as well.

Edit: Well I went ahead and used the method in the OP. It's working so far. Already had my handheld registered at Yahoo Mobile.