So I just got my very first iPhone (iPhone 4) and being an android user I found some stuff to be rather… difficult and uncomfortable. Anyway, I was trying to send multiple-sms telling some of my contacts and as soon as I added another contact, it changed to ”Group-mms”. I didn’t notice this so I just sent it away and most of the people don’t even have MMS enabled, recieving just a message that I sent them an MMS.
What you need to do is go to Settings > Messages and turn off MMS. Then it will send multiple-sms. Feels really really silly to have to turn off a feature to use another. And if anyone knows a better and smoother way please do let me know 🙂