Why is there no text message on my mobile phone?

How to deal with the lack of SMS function in mobile phones;

1 1. The SMS function on the mobile phone suddenly disappeared because the SMS system of the mobile phone failed, so the factory settings were restored and the mobile phone was restarted.

2. If the problem cannot be solved, it is recommended to go to a professional maintenance office for professional maintenance.

3.SMS is a short message service. It is the earliest short message service and the most popular short message service now. Through it, mobile phones can send and receive short messages to each other, and the content is mainly text, numbers or binary non-text data.

At present, the length of this short message is limited to 140 bytes. Short message has been welcomed by many users because of its simple and convenient use function, and it has spread rapidly. However, it is always the first generation wireless data service, which is limited by technical standards in content and application.