I also came from iPhone missing this feature. There are a couple of alternatives. Infernalblaze listed two, but I don't like those as it uses MMS for ingoing and outgoing and it just lags the phone up like crazy. You can either get your friends to install a 3rd party app to group with like whatsapp or groupme. The nice thing about groupme is your friends do not have to have the app installed. Just you need to make an account, and then put in their numbers. Then you will all just text to a newly created number and it will show up as a group text with your names attached to the text. Less hassle and lets your iphone friends use the native messaging app as well as you. You just need group me to setup the group. or phone.com will do this too. Only downside is no MMS but you can use GOSMS to do that.