Hey, after decrypting my phone and using the method you posted in the pe thread to flash roms, I am still getting service problems. I've also noticed that anytime I have tried to open carrier settings on the phone, I get a ".com.android.phone has stopped." So I cant update the prl at all. I've seen people post about modifying the APN settings but I thought that was irrelevant on sprint. I'm honestly out of ideas.
Well, when nothing helps, it's time to go back to stock.
Get firmware for your location - different firmware (modem especially) for different markets.
Don't use any "tools" or .bat files you find here and flash with fastboot - do 1 command at a time and note results, (remove sim before flashing and reinsert after you've booted into stock once).
See what happens. Sometimes things get messed up enough to where flashing stock is the only thing to do. That'll really clean it out.
I had a real funky issue when going from att to vz. Spent hours with straight talk trying to sort it out (had 4g but no calls or texts). Flashed stock - popped sim in - bang - everything working, and has been ever since and I've flashed them all, some several times, still good.