I just got a Sidekick PV300 for T-Mobile but I want to unlock it so that I can use it on AT&T. Where do you recommend getting the stuff to do it with? What features will and wont work?
May be you can ask T-mobile itself for codes. I checked out this site mobile-unlocker.com which i used to unlock and it shows that they would give you the codes within 5 hours. Have a look at it. It will help you.