Help Galaxy s Three 3G issues

[Aussiebloke]

G'day just bought a galaxy s having fun with it, just have a major issue. I bought it online it said "unlocked" but it seems that there's optus stuff on it. I connect to 3 mobile service but it won't connect to 3G, someone able to give me a fix? Or send me in the right direction, cheers

 

[GalaxyTDM]

You probably need to get the correct apn settings from your provider and enter them into the phone.