I took out a 18 month contract in October 2008. I received a Nokia E71 which I gave to a friend as a present and have since used a 2G Nokia 6300 since. I just received a text from 3 that my 2G Phone will no longer work in 5 days time with my 3G sim. Is this a viable reason to leave them? I think it is, since their changing terms of contract; I should be able to use ANY phone I want...