Gmail allows USA and Canada free calls to Landline and mobile.
You need Internet connection , a Gmail account , Mic and Headphone for free call
Step 1 : Go to Gmail and Login
Step 2 : Left Side bottom there is a call button click it
call button in gmail
It will appear like below image.
Calls in gmail
Select country( 1)
add phone number(2)
click call button (3)
call to a number
Now you get connect to call
Enjoy Free calls
if you have any problem comment below.