Samsung SM-N960F/DS User Manual page 117

Apps and features
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 and tap Conversations.
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
To adjust the font size, spread two fingers apart or pinch on the screen.
Blocking unwanted messages
Block messages from specific numbers added to your block list.
1
Launch the Messages app and tap → Settings → Block numbers and messages →
Block numbers.
2
Tap Inbox and select a contact. Or, tap Contacts, select contacts, and then tap Done.
To manually enter a number, enter a phone number under Enter number and tap
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