Huawei's p7 mobile phone can't send short messages, so it needs to be turned on and off again. What happened?

1.？ If the prompt fails after sending a short message, you can choose

① Enter SMS > More > Settings and select Restore Default Settings;

② Go to Settings > Application Management > More (or Menu) > Display System Flow, then select information, click Save, and then select Delete Data to clear the cache;

③ Go to Settings > Advanced Settings > Backup Reset > Restore Network Settings (some models don't need this setting), and then try whether you can send SMS;

2.？ If none of the above can restore the SMS sending function, please back up important data and restore the factory settings to try to solve it. If it still can't be solved, please back up important data in advance and bring the purchase invoice to Huawei customer service center for testing and processing.