No technical assistance

[mdual2004]

My xperia m dual is unable to register on 3g networks

[Phy]

Is your phone compatable with your network's 3G bands?

[Hampus]

Hi,

If the phone is compatible with the frequency bands, you can try to download internet settings via Settings > More... > Internet settings.

[FrontierGate]

Sim locked to another carrier? New or 2nd-hand phone?