Lumia 920 mobile data issues on o2

[Adam Meyer1]

my lumia 920 is on a contract with texts, calls, and data..
calls and texts are fine, but the data is not. I have an "H" at the top, which should mean the 3G is up and running, but i get error messages all the time saying the DNS server isn't found. I put the sim in my unlocked lumia 800 and it worked fine. anyone else had this issue or similar?

 

[BIGPADDY]

You might have to put the O2 setting for internet on setting then access point.