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What is the message sent by vivo mobile phone that always shows "check and try"?

The cell phone signal is not good

Abnormal mobile phone data

It is recommended to try the operation according to the following methods:

1, the cell phone signal is not good. It is suggested to try again in a good area or time period.

2. In the information interface, press the phone menu key-Settings, and click Restore Default Settings to try.

3. When inserting the dual card, please confirm whether the SIM card is closed.

4. The phone bill is in arrears or the SIM card is broken. Recharge the SIM card or try to replace it.

5. The number of SMS center has been modified and cannot be sent normally. Click SMS-Settings-SMS Center Number to check the SMS center number, and then search your local SMS center number online to see if your mobile phone is correct.