Applicable to End Users
In a chat thread, you can select and delete one or more messages.
Delete Message in iOS
Open a chat conversation. Messages are displayed in thread view.
Long-press a message bubble. A list of message actions is displayed.

To delete a single message, tap Delete for Me.
To delete more than one message at a time:
Tap More to enter selection mode.
Select the message(s) that you want to delete.
Tap the Delete icon.

Delete Message in Android
Open a chat conversation. The messages are displayed in thread view.
Initiate a long-press on a message to delete the message.

Tap the delete icon.
A pop-up appears asking you to confirm deletion.

Tap DELETE.