by this extension, your client will log-in to your website by email or telephone number . and this extension is integrated by the telephone field in OPENCART .
Easy Installation, Just upload the extension and the extension will do everything . integrated for any custom fix for themes and codes.
We are not after your money a smile on your face is what keeps us rolling.
FEATURES

No Code is Needed, just upload the extension and refresh the editing then refresh modifications and clear the theme caches if it is enabled.

Validation Telephone number in registration ( logic and taken ).

[*]Integration with quick, One Page, and Opencart checkout.

PS: Please Make sure the telephone field is enabled and required!