Samsung SM-J260M/DS User Manual page 52

Apps and
Viewing messages
Messages are grouped into message threads by contact.
You may incur additional charges for receiving messages when you are roaming.
1
Launch the Messages app.
2
On the messages list, select a contact.
3
View your conversation.
To reply to the message, tap Enter message, enter a message, and then tap
For dual SIM models, tap
Setting the message notification
You can change notification sound, display options, and more.
1
Launch the Messages app, tap
the switch to activate it.
2
Change the notification settings.
or .
→ Settings → Notifications, and then tap
5
.