Mobile game compatibility

view story

http://stackoverflow.com – I want to try my hand at game development and I just had a few simple questions that I can't seem to find the answers to. First, is it better to have a multiplayer game connect via bluetooth or wifi? Also can you have a multiple people play the same game with different platforms (Android and iOS simultaneously). And what service would have to be used to actually connect multiple players? I'm assuming a web server but I'm not completely sure. (HowTos)