I have an HTC Fuze with AT&T as my carrier and I also have a blackbery curve 8310 that a friend gave to me. The curve works, and I really like the feel of it as a phone, and kind of consider it to be an expendable item, but I want to know if there would be any problems if I were to just toss my fuze's SIm card into it and use it as my phone on the weekends when I go out so I don't have to worry about losing a pricey piece of equipment. I have unlimited data and texting so I'm not worried about data charges, just if it would work, if AT&T/Blackberry would care, and suggestions regarding the matter, thanks.