Plugin adds phone number mask.
Example
(999) 999-9999
(999) 999-99-99
+1-999-999-9999
Not registered version is fully operational. It has only one limitation. Trial period 30 days. Try before buying.
How to install and configure the plug-in http://www.foxnetsoft.com/documentation-nopphonenumbermask.
Link to our site http://www.foxnetsoft.com/nopphonenumbermask