Don't know how to add users phone number

[ThinhDinh]

Please keep the discussion to the linked thread. It seems like this is a duplicate.

Need a msg alert box like to enter phone number

Hi Thing is I’m placing a order so that it creates a new row in orders sheet.but I need their phone number.means if I click the place order button,it should show some text or number field to enter phone number and then saved to that same order.how can I achive this?