hiding characters of phone and email

I friends am having hard time to hide the characters of phone and email based on role.

I tried using help from old forum update…

https://suitecrm.com/forum/developer-help/1846-hide-field-based-on-role-change-data-based-on-role

you can use this module https://store.biztechconsultancy.com/suitecrm-field-level-access-control.htm

best regards