Why can't I send a text message after imessage is closed?

When you send a text message on your mobile phone, it shows that you have been sending it for a long time. There are many possibilities! 1, the first case is that this is normal, because your network signal is not very good, resulting in network delay! But when you use your mobile phone, you exit the interface and then enter it again. The display has indeed been sent. 2. Generally press the sensing key on the right of Home. Just re-enter it! At the same time, you can check whether the SMS can be sent and whether the flight mode is on. Just open it again! 3. Another situation is that you use mobile phone management software. Generally, mobile phone management software has startup prohibitions. After entering the software, check whether the short message is also banned. If it is banned, just change it and restart the phone. 4. At the same time, if it can't be solved, you can try to restore the factory settings, but remember to back up the data on your mobile phone with backup software! 5. There is also the case that you have turned off the SMS function yourself. This situation can be solved by just making a phone call and providing manual service!