The Red Asterisk is Still Visible

If you set the field to not required but the asterisk remains, it is likely a CSS issue or a caching issue. Clear your browser cache and server cache (e.g., WP Rocket or Redis). The WooCommerce optional phone field logic is usually sound, but the visual rendering might lag.

Some premium themes have their own checkout managers that override standard WooCommerce hooks. If the code above doesn't work, check your theme settings (Appearance > Customize > WooCommerce > Checkout). If the theme forces the field, you may need a higher priority on your filter to enforce the WooCommerce optional phone field.

Checkout Field Editor Plugins

If you have a plugin installed like "Checkout Field Editor," it might be controlling the field settings via the database, rendering your functions.php code useless. To successfully implement a code-based WooCommerce optional phone field, disable these plugins or use their interface instead.

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