> 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-out-of-stock-notification-extension/mobile-number-validation.md).

# Mobile Number Validation

<figure><img src="https://807210804-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8wMgNeFnYjVGQmgdxMv4%2Fuploads%2FzzfXLDRr6IIUKEbiGmsk%2Fimage.png?alt=media&amp;token=7bc752ee-cba0-4d7f-abfd-e3d43ea08a91" alt=""><figcaption></figcaption></figure>

The admin set the mobile number validation based on the country when the user enters their mobile number for back-in-stock notification.