Apple have introduced the ability to send a group SMS from the messages app. I don’t know when they did this but it is a very handy feature that you may not have noticed. Previously you needed to download a 3rd party app (e.g. ‘Connect’) to send group messages but now you can do it from Apple’s SMS app. Here’s how.
This brings the group texting of the iPhone almost on par with Android.
Note that some mobile phones or plans cannot receive MMS texts so not everyone will be able to receive a group message.