There is no surefire way to cancel a text message after it has been sent. However, there are a few things you can do to try to stop the message from being delivered:1. If you are using an iPhone, you can go to the Messages app, open the conversation containing the message you want to cancel, tap and hold the message, and then tap the \\"Menu\\" icon. From there, you should see an option to \\"Cancel Send.\\"2. If you are using an Android phone, you can go to the Messages app, open the conversation containing the message you want to cancel, tap and hold the message, and then tap the \\"Delete\\" icon.3. If you are using a Windows Phone, you can go to the Messages app, open the conversation containing the message you want to cancel, tap and hold the message, and then tap the \\"Delete\\" icon.4. If you are using a BlackBerry, you can go to the Messages app, open the conversation containing the message you want to cancel, tap and hold the message, and then tap the \\"Delete\\" icon.5. If you are using a feature phone, you may not be able to cancel a text