Ive seen a list of phones that can pair with the 770 but with hundreds of phones out there it cant possibly be an all encompassing list. Does anyone have any experience trying to pair any of these phones with the 770?

Motorola V557

Samsung D357

Sony Ericcson Z520a

Also, whats the difference between file sharing and dial up networking? Does the latter require a dial up ISP or will EDGE access qualify?