Not sure if they've started to push this yet but you can now sign up to roam (for free) between Orange and T-Mobile 2G networks (for voice / text). Apparently 3G will be coming soon as well. They're doing it as an opt-in service to start with for testing. If you're on orange you need to go here: https://kareena.orange.co.uk/share/optin T-Mobile is here: Increase Your Mobile Network Coverage with T-Mobile & Orange You sign up then they send you a text to confirm to which you reply and then you're good to go (a re-start may be needed). No problems on my HTC Legend, can't imagin there would be on any other android phones either. Appologies if everyone already knows this but it was news to me!