> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://dots.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# 2.0 Why does the customer not receive an SMS with a confirmation code?

* Problems of the mobile operator;

* Problems with the client's phone or coverage area;

* Zero balance on the SMS service account;

* System protection does not allow you to make more than one order for one phone number within one minute;

* The user's phone number is blacklisted;

* In the user settings, the setting - Do not require an SMS code when placing an order is activated;

* When placing an order, the user entered an incorrect phone number;

* Integration with SMS gateways is not configured;

* The user is in superadmin status.

* You can learn more about this functionality here.

Link to this article: [here](https://dots.crisp.help/en/article/why-does-the-customer-not-receive-an-sms-with-a-confirmation-code-1oqr36a/).