ok so ever since i got my hero i never used any sort of facebook app. normally when i wanna check my facebook i turn on my mobile network and i go to facebook.com using the internet. People using Iphones facebook is like on 24/7 for them. they get facebook notifications to their phones and such. is there a facebook app for the hero that that does and such, and would i need to keep my mobile network on 24/ in order to get the notifications?