I currently have an iPhone 5 which i got on release day from 02. At first i had problems sending and receiving texts and phone calls, texts would come through hours or even days later than sent and with calls the phone wouldn't ring, these were all while having full signal and in several different locations. After talking to 02 customer support many times i was issued with a new sim, this didn't resolve the problem. I then changed the phone at an apple store, still didn't resolve. I have restored the phone, been switched off at 02's end and eventually given a new sim-only contract on a new account, even after all of this i still have the same problem. This week i rang 02 to see what else can be done, it took four calls from my phone all of which cut out just after i had got hold of a member of the customer support so i then had to use my girlfriends Vodafone phone to ring 02, this call cost me over £10 as apposed to the usual free phone number i can use from my 02 phone. I was hoping for my phone to be unlocked so i can move to a network that works as currently i am paying for a poor at best service. However i was told iPhone 5 currently can't be unlocked.
Currently 02 are not offering me a way to get a working service and their only advice was that "they are not stopping me from moving to another network" and that i should feel free to do so. However as my phone can't be unlocked, financially i cannot afford to buy a new phone and move elsewhere.
does anyone have any advice for me?