If you want to delete a group message on your Android device, there are a few different ways to go about it. The first way is to open the group message and tap on the three lines in the top left corner. Then, tap on the “Delete” button in the bottom right corner. If you want to delete all of the messages in a group, you can do that by opening the group message and tapping on the three lines in the top left corner. Then, tap on “All Messages” in the bottom right corner. Finally, tap on “Delete.” ..