I have been a customer of O2 for 4 years. I live in London and have been travelling extensively. I have been using a blackberry account and in the last year I have made the mistake of getting an iPhone by O2. My total monthly bill has steadily increased to around GBP180-200 per month.
However, 3 weeks ago, I took a one (1) week vacation to Egypt and took my iPhone with me. I was very careful to not use my iPhone, afraid of potential charges. But today I have been slapped with a GBP 1, 066!!!
It is clear that the O2 iPhone service has been designed to rip off anyone stepping outside the protection of EU tariff protections. And O2 are more than happy not to alert early their customer (me) that daily charges 5-10 times the regular volume are being accummulated. Even credit card companies have a simple fraud detection service to call you when unusual activity happens.
O2 "client service" refuses to reverse this ridiculously high charges which is 5 times what I have ever paid in a month. O2's treatment of me as a client is abusive and disgraceful. It is so ridiculous that they are so protected by the high switching costs that they really do not care about any individual client.