Hi Alan,
I hope you are doing well.
Yes, I think the issue was due to the additional plugin Checkout Field Editor for WooCommerce, which was causing a conflict. I renamed the bill-form.php file, and the phone field became operational again. I proceeded to conduct about 20 tests on different browsers and mobile devices, and everything seems to be working fine now.
Thank you for your response, Alan.
Regards,
Tiger Click
