iv'e been on orange for the last few years, and they've always been very reasonable. the shops are actually quite useful as well and whenever ive wanted anything done with my contract i just went into the shop to get it done.
i changed to the carphone warehouse cos i'd heard good things in november... they haven't got one of my bills right yet... funnyly enough they always seem to make the mistake of over charging me and never under charging me Ruth - when i got my 1st phone from phones 4u/singlepoint when i wanted to keep my number but change my contract an get a new phone - the manageress in the leeds store just started shouting at me cos i didn't want to stop that contract an get a new number! :spangled: i jus smiled and nodded whilst edging slowly to the door!
for performance and customer service id go for orange and tmobile. orange are pricey but very good cust service......
I'm on Virgin UK at present, not had any problems with it apart from trying to register ma credit card - after being on hold for ten mins each time I hung up Moving to Vodofone on Thurs due to the purchasement of a spanking Sharp GX30 DAS IST FANTASTIC YA!