Vivo mobile phone SMS can't be dialed out.

Check the cell phone signal. If the mobile phone uses a metal or magnetic protective case or bracket, the protective case and bracket will affect the signal of the mobile phone. I suggest you take it off and try it. If you are in underground parking lots, elevators and other environments, the coverage of mobile phone signals is easily affected by these environments, the signal will be weak, and the data network will also be affected. It is recommended to go to an open place, such as outdoor open environment testing.

2.

Switch flight mode You can try to switch flight mode and re-register the network.

3.

Confirm whether the mobile phone card has enabled the call barring service, and some operators have the call barring service. If