Z3 SMS flashback

If the short message can be received normally but cannot be sent, please follow the following steps to restore the service:

1. First, check whether a large number of short messages have been sent in a short time. According to the requirements of the Ministry of Industry and Information Technology to punish spam messages, China Telecom has set a threshold for messages sent by users every hour and every day. If the number of short messages sent exceeds the limit, it will join the blacklist system.

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

3. Check whether the "timing information" is set on the mobile phone, which leads to the delay in sending the short message and mistakenly thinks that it has not been sent successfully.

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