Make sure you relock your Sprint TP2 after you flash back to stock rom(not before):
RhodiumW CDMA Worldphone HardSPL Unlocker Release
From the thread above:
"
how to reflash Stock/Shipped SPL: - STEP BY STEP - FOR WARRANTY REASONS ONLY!
0. please make sure you already flashed stock ROM and radio, because stock SPL flash is *always* the last step before sending the device in.
1.
download the Relocker by clicking here, extract the zip and run the EXE on your PC
2. if you wish to replace RUU_Signed.NBH that got extracted, feel free to do so, but not necessary (this Hard-SPL will only allow overwrite with a SPL made by us). the included one is the 0.63.0000 stock SPL. 3. flash
4. verify if it flashed by checking version in tricolour screen, it should say 0.63.0000, not 1.00.OliNex.
"