I was thinking of ordering the MM-A900 on-line, because there are some good deals. Some sites are offering the phone for free w/ new activation line(of course after rebate) + free two day shipping. I'm not really familiar with ordering things on-line...has anyone ordered there phone on-line before? how does it work? is it really better to order on line...does it actually end up cheaper than going to a retail sprint store? any help will appriciated. Thanks!