You can delete the message from another phone by following the given steps: Step 1: First, you have to click on the Message+ button. If you aren't able to find it, then navigate to Apps, then click on Message+. Step 2: Then choose a conversation Step 3: Next, tap one of the messages and hold it. Step 4: After that, click on the Delete message. You can select more messages if you want to. Step 5: To select a message, click on the check box. Step 6: Finally, tap the Delete button on the top right corner, and your selected message will be deleted.