Would give less than 1 star! Level of service is bad, try and con their customers. Beware! Been with them for more than 10 years. They wrongly taken another account under my name. Didn't give me any info on it until I went to the bank. Called many times to rectify, only to never get an update. Made out it was my mistake. The other account never been used. They had the audacity to say it to make it sound like it was me. Will close my O2 account since they treat their customers like fools! Check all tour accounts to make sure you only have one, as they are very sneaky. Didn't want to offer compensation for stress caused.