You can use RCS in any way you like, as long as it's through Google Messages.

Messaging and social media apps, including WhatsApp, Telegram, Signal, and Instagram displayed on a smartphone screen. - Thrive Studios ID/Shutterstock The freedom that an Android phone offers also ...

RCS is the modern upgrade to SMS and MMS, bringing better photos, read receipts, typing indicators, group chats, and growing iPhone-Android support in 2026.