Question DOESN'T WORK Mobile Data.

Hi everybody! I have got Samsung SCH-I800 CDMA from U.S.Celullar. I installed rom for SPH-P100 by Sprint. It`s a good rom, but don't works Mobile Data. I am from Ukraine and use our CDMA operator Intertelecom. Tablet is conecting to internet. In the billing program conection up, but browser and app don't work. On my opinion, the problem is in DNS by Sprint. How can i change these DNS?