help with a few functionalty differences between galaxy nexus and iphone

ive recently come from an iphone 4s and while i absolutely love my galaxy nexus there are a few things to miss. Group Messaging in iOS was pretty cucrucial to me and it doesnt seem to be an option in ics, does anyone know if im missing something? also i tried to message a simple video of 1mb and keep getting denied on the galaxy nexus where it was never a problem on my iphone. whats this all about? theres several other little things that are petty but drive me crazy.