What if the mobile company turns off the SMS function without telling?

What if the mobile company turns off the SMS function without telling? There are two ways to open it:

1, go to the mobile business hall where the sim card belongs and find a staff member to solve it;

2. Dial 10086 by mobile phone, and then transfer to manual service negotiation.

Note: At the time of opening, the mobile company may require the guarantee certificate such as letter of guarantee.

When users send a large number of spam messages and the information content involves sensitive topics, the mobile company will be moved to turn off this function.