[ttlycnfuzd]

Like the previous poster said... Search Is Your Friend. There are many posts that help people keep track of things, primarily, CDMA vs GSM.

Here's the thing - Your phone is a CDMA (Sprint) model, but being a world phone, you have the ability to run GSM (T-Mobile). Just because you have a GSM Radio does not mean that you can run GSM roms. You will run into major troubles. You will always want to use CDMA specific apps/roms/hspl... etc.

Please keep that in mind when making changes to your phone.