I've never had problems with 02, but then I'm just on pay as you go. Most of my friends here are on vodafone, which seems to be very good. my mate's got that stop the clock deal, he gets unlimited texts, and pays for 3 minutes and talks for up to 60, and pays about £20 a month. think he gets an especially good deal cos he's a student, but they do well otherwise too i think.