3G is not working on my Iphone 4 HELP!

[candn14]

I have an Iphone 4 32gb running 4.3.3 on AT&T which is unlocked using a Gevey Sim.

One problem the 3G does not seem to be working.

So what can i do to sort this out?!?!

Thanks in advance....

 

[candn14]

No one.....?

A message comes up with saying could not connect and something wrong with Cellular data! I have full signal and states that i have a 3G network on the top of the phone!

Any ideas?