I never considered t-mobile, not sure why. Where i live has poor 3G signal and o2 just about hangs on. Their speeds are fast for me, 3 - 4.5Mbit. Three have a much better signal but really slow down at peak times and are generally slower.

How does T-Mobile compare? Do you tend to get a 3G signal most places and is the speed fairly fast?

I'm tempted by their merger with Orange as Orange do seem to have 3G in most places so i will look forward to that over the next few months of rollout.

I will be getting a Sim only for myself and my wife a iPhone 4s. i take it there are no issues with t-mobile iphones? I assume completely different from the states where iPhones dont work with t-mobile at all.

thanks,

You should get t-mobile 3g in more or less exactly the same places as three, but now with the added advantage of roaming on to orange.

Some traffifs on t-mobile are capped at either 900 odd k or 2meg but speeds are usually quite consistant.

Might be worth trying a hspa+ capable dongle on three, made quite a difference in my area.