LINE Labs
By using the Silent messaging feature offered in LINE Labs, you can send messages without recipients receiving pop-ups or push notifications.
To send silent messages, enable the feature in advance by following the steps below.

1. From the Home tab, tap > LINE Labs.
Note: Tap here to go to Settings from your main device.
2. Turn Silent messaging ON.
To send silent messages:
1. Open a chat and enter your message.
2. Tap and hold > Send silently.
Note: If you tap Send normally, the recipient will receive a notification.
When sending silent messages, the recipient can confirm that new messages have arrived by checking the unread message count on the LINE icon and the Chats tab.
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