3G connection problem

[baytat57]

have a 3G modem using dm800 jet. Modem pc network not too bad, but I'm breaking the device and test many say can not connect to the internet I get the DNS name of the verified notice. I choose the wrong choice but I do not know the connection settings for the modem-network-preferred other options automatically have the preferred connection type 3G/EDGE PREFERENTIAL I wonder which one best set of problems waiting to be experienced thank cı help from friends