[nxtech3]

carriers definitely dont encourage Custom ROM flashing, that being said, Sprint cant tell wirelessly that youve flashed a custom ROM, and even most Sprint stores wont be able to tell unless that specific person has some knowledge of flashing. If someone comes in my service center with a custom ROM, i just let them know before i can do anything with device i have to flash the stock ROM. Most people are cool with it, if not, i hand the device back and DBR in eticket lol.