Alright 6 months ago or so I bought a new cell with the plan 5, then turned it into my 10 with the student plan. I bought the Sony Ericsson W580i and now i see its not that handy to text. I want a new phone that is the same price as Sony Ericsson and I want a plan with unlimitted texts. I can figure out wich plan I will buy but is there a way to change my cell?
My big question is if I could change my cellphone if it costs the same price ?

And my second can I change my plan and if I do will it have to last 3 years or i can bring it down to 1 or 2 ?