HERE IS A QUICK STEP BY STEP IF YOU DON'T WANT TO GO THROUGH ALL THE STUFF ON THE OTHER FORUM:
REQUIRED TOOLS/SOFTWARE:
Motorola Triumph USB cable- Others may work but this cable was designed for use with the phone, use it if possible.
Stock Phone Driver- Found on the phone when connected via USB. This driver should be installed before attempting any modifications.
QPST 2.7 Build 366- This is what I use, other versions may work as well.
Sprint PRL 01115- This is the latest version of the Sprint PRL and includes the most recently added towers. Using another carriers PRL might eventually allow the Triumph to be used on another carrier if you can get the ESN added to that carriers database, but that's another issue that I'll leave for someone else to test down the road. Just use the Sprint PRL.
MotoConnect- Not technically required but makes the detection process easier due to notification windows.
NOTE: Phone does not need to be rooted to complete this guide.
HOW TO SWAP YOUR PRL:
First things first, make sure you have the required software and drivers installed and that they appear to be working correctly.
Now its time to get your MSL. Thanks goes to mmarz over at XDA for originally discovering this method.
1. Log into your Virgin Mobile account.
2. Click this link.
3. Although you get a 404 error page, search the page for "msl:"
4. The six numbers after msl: are your MSL code. Write them down.
Now that you have your MSL I suggest you put it into a notepad document and save it.
The next step is to identify what COM ports your particular computer uses to connect with the Triumph. Open your device manager on your computer and expand the