I have been with 02 for 26 years. However after trying to upgrade three times and still awaiting a confirmation email after 4 phone calls, I have decided to go elsewhere. I have sent 2 complaint emails, neither have been responded to and I just can’t believe how bad the customer service actually is. Unfortunately I will be only one of many to leave if you treat all your customers the same. I have 2 other business phones with 02, I will be also cancelling the contract on them as well. Good luck you’re going to need it!!