I bought an iPhone 18 months ago on 02 and found that the signal strength is shocking in most of the places I want to use it, I had a plan to unlock my iPhone and cancel my 02 contract and get a vodafone sim. I found this one which seems to offer what I want and for only £20 per month as opposed to the current £35.
I went into Carphone Warehouse and told them what I wanted to do and they said I couldn't. The sales assistant said that the technology on the iPhone and sim card would mean that several features would not work. She then went on to say that she was not a liberty to tell me which features but that I should just take her word for it, if I wanted to be on Vodafone then I needed to buy a new Vodafone iPhone.
This seems like a load of you know whats to me but none of the other sales assistants batted an eye lid so I thought I would ask for other opinions.
Thanks