What is the difference between iMessage and SMS/MMS? - Apple Support

What is the difference between iMessage and SMS/MMS? - Apple

MMS vs SMS: Key Differences and How To Use Them

The Differences Between SMS, MMS, iMessage, and RCS

iMessages vs SMS Messages: What's the Difference?

Why iMessage is such a big deal: A guide for the rest of the world

Google's New Android Website Asks Apple to Add RCS Texting to

Apple announces that RCS support is coming to iPhone next year

Difference between SMS and MMS - GeeksforGeeks

Apple outlines iMessage spam reporting in new support document