From the Messages app, tap the Profile icon.
Next-Gen Messaging requires Android 5.1 Lollipop or higher, Android Messages version 4.3 or higher, and a connection to a wireless monthly plan with data or a Wi-Fi network on a compatible device.
Tap Mesages settings.
Tap RCS chats.
Tap or slide the Turn on RCS chats switch to ON.
You've completed the steps!
