> It's like 'group' SMS, your phone might provide you with a single chat window with all your friends, but what it really is doing is just sending a separate SM

> It's like 'group' SMS, your phone might provide you with a single chat window with all your friends, but what it really is doing is just sending a separate SMS to every one of the recipients. Most modern phones use MMS Group messaging for groups larger than two. It's more efficient and flexible than SMS.