Pay as you go - nightmare trying to top up! Was at 27p credit, when initially tried to top up via mobile, it put me through to customer services number, informed me there would be a one-off fee of 25p that you have to agree to pay before they put you through to a rep, once I'd agreed it took the 25 p and cut me off! Then via landline, on hold forever...no indication of how long you'll be waiting or where you are in the queue...whole process took an hour - what's excellent about that customer service?