To delete messages in Viber, follow these steps:

Deleting Individual Messages

For both iOS and Android:

  1. Open Viber and select the chat containing the message(s) you wish to delete.
  2. Hold down on the specific message until a menu appears.
  3. Choose 'Delete'.
  4. Confirm whether you want to 'Delete for me' or 'Delete for everyone'. Please note that others in the chat will see a notification indicating that a message has been deleted.

Deleting Multiple Messages

For both iOS and Android:

  1. Go into the desired chat.
  2. Click on the three vertical dots (Android) or 'More' (iOS) in the upper right corner.
  3. Select 'Select Messages', then mark the messages you want to delete.
  4. Press the trash icon in the lower left corner to delete the selected messages.

Deleting Entire Conversation History

To delete all messages in a chat, including those for all participants, follow these steps (note that this action cannot be undone):

  1. Open Viber and enter the chat where you want to delete the message history.
  2. Tap on the person's name at the top of the chat.
  3. Scroll down to the sidebar menu and select 'Clear chat content'.
  4. Confirm by selecting 'Clear' in the popup; all messages in the chat will be erased for both parties.

Please remember that while you can delete messages for everyone, the recipients will still receive a notification stating that a message has been removed.