omg , i cant connect to the 3g ... sorry , newbie to 3g services here, can anyone teach me ?

i checked, my area is within the coverage, and the network list found in my hp oso have "3G DIGI" , but every time i try to connect to it , it said "Failed to Register".

is my phone problem or i need to install something before i can use the 3g ?

My hp is CSL G10 using Digi Easy Prepaid , 010 .

anyone , please help . tried every day, but stil cannot.....