Terrible Service. I am so disappointed with O2, and as soon as my contract is over I will be sure to end it entirely with them, I would never recommend O2 to anyone. They have random hidden charges, and they charged me £35 for 42MB for one day abroad, even though they have a service for £4.99 for data a day, but they do not inform you of this or even send a message to you so you can start the service because they obviously want to charge obscene amounts. Truly disappointed, counting the days till my contract ends. Wherever I can write a bad review about O2, I will be sure to, hoping prospective customers will think twice before they begin a contract with this overcharging company.