I am scrapping the sprint sero plan and sticking to tmobile. I currently have a blackberry 8700g and plan to add the blackberry curve 8320 to my account. Is it possible to swap sim cards between the two blackberries. I was going to change to a family myfaves and keep blackberry add on on my 8700g and opt for no data on the curve with the intentions to swap sim cards and use the curve with my 8700g number and blackberry add-on. Will this work?? thanks. G