Originally Posted by sllevin
I tend to prefer Vodafone because they have a good network -- but be warned, only their 900Mhz is great (again, not a factor for a Treo 600). On 1800 only I'd go with T-Mobile or O2, with Orange a distant third.
In the UK, O2 was originally a 900 MHz core network but now has 1800 MHz capacity in certain areas. The same is true for Vodafone. T-Mobile and Orange are 1800 MHz networks. Orange's 1800 MHz coverage is far better than O2's.