Please help, Z3 text messages cannot be received and sent.

If the mobile phone text messages are received normally but cannot be sent, please follow the following steps to restore the business:

1. First check whether a large number of text messages have been sent in a short period of time. For the operation of mass sending, in accordance with the requirements of the Ministry of Industry and Information Technology to combat spam text messages, China Telecom has set thresholds for the text messages sent by users every hour and every day. If the number of text messages sent exceeds the limit, it will be added to the blacklist system.

2. Please check whether the mobile terminal has set a limit on the number of text messages sent.

3. Check whether the "scheduled message" is set on the mobile phone, causing the SMS to be delayed and mistakenly thought that it was not sent successfully.

4. Please use other telecommunications mobile phones to test whether it is a problem with the terminal or the mobile phone. For UIM card and terminal problems, you can try to save important information and restore factory settings to try to recover. For UIM problems, you can go to the nearest business hall to replace the card.