Phone number is required to fill when you fulfill order from AliExpress.
It will be some inconvenience if you have a ton orders, and you have to fill phone number for order one by one.
With Override phone number function, we will help you fill the phone number and your work will be a lot easier.
Hope this help for you.
Should you need further support, please feel free to contact us via live chat or email us at firstname.lastname@example.org