The worst network provider in uk. absolutely appalling customer service time and time again. every single customer service member has attitude problems. they do not listen nor do they genuinely attempt to help. their first recommendation is always to pass you on to someone else. They do not log all the conversations (security concern). All in all do your research and speak to existing O2 customers before locking yourself with a company who has appalling customer service. not only they are rude, no interest in helping but on top that they are abroad, very difficult to understand, they also use (voip) for their telephone lines. Bad quality sound. If you do not want issues do NOT join o2.