receiving data without data plan

[jmacphee9]

now i would guess that this would probably go in the sprint section if there was one, buttt we have three vogues in our house with sprint service. none of them have a data plan, one is running dharveys rom, one is running wdm's manilla rom, and one is completely stock. since flashing the rom the phone running manilla is receiving full data, while the other is not. the one running dharveys rom let customizations run while upgrading radio for 1/4 of a second because i had trouble getting to the soft reset button lol, but the other manilla rom was flashed perfect and now it gets data. anyone have any ideas as to why this is? before the roms were flashed none of them received internet, and we do not pay for data.

im going to guess and say we are getting charged for this, but input please.