> For the complete documentation index, see [llms.txt](https://docs.magecomp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.magecomp.com/magento-2-sms-notification-basic-extension/different-mobile-number-error.md).

# Different Mobile Number Error

If your customer has by mistake enter different mobile numbers in checkout instead of keeping the same mobile number, the extension will throw an error.

<figure><img src="/files/cGoz9rtV1T2rBZOtAXhh" alt=""><figcaption></figcaption></figure>