I am replicating my question raised here: Why in User doctype , Phone has not option set as "Phone" ? · Issue #6713 · frappe/frappe · GitHub
I was given a task of formatting Phone in an international format system.
Searching about it, there is validation in “Data field” if option Phone is set
But as I see in core doctype like User frappe/user.json at develop · frappe/frappe · GitHub
this option is not set.
If where any reason that I am missing ?