If you are an Orange customer you should automatically pick up a T-Mobile signal (2G only) if you are in a weak Orange signal area.
If you are a T-Mobile customer you should automatically pick up an Orange signal (2G only) if you are in a weak T-Mobile signal area.
BOTH networks should be able to use each others 3G signal soon.
BOTH networks will also be able to use the 3 network signal in a three way network agreement in approx 6 months.
Source: Digitalspy
Cheers for the info. The auto pick up doesn't work, but manually setting does. Fine by me.