[tx_dbs_tx]

If you flashed the stock sprint ruu from your pc, then that will remove your custom recovery leaving you unable to flash a custom rom. Hboot S-On will remain but you still need to get a custom recovery back on your phone if you want to be able to flash custom roms. This will require you to reroot. I can't think of any other reasons why you can't video call with custom roms yet you can on a stock rom. You really should flash the S-On tool by unrevoked and unroot by flashing the stock ota 3.70 rom AGAIN. This will put you back to fresh out of box condition. Test, then reroot but this time start by flashing a different rom that DOES NOT include the radios because you will already have them from flashing the new ota 3.70 sprint ruu. This is what i would do if I were you.