Mail button instead of phone button

Hi i have tried to read other threads about this but can not solve to manage to change the ´phonepicture on the button, I would like to have a Picture of a letter maybe instead or just take the phonepicture away, thanks.

 

Hello,

To change that image go to the
Theme directory > images > call.png
and replace it with your image.
Keep name same of both images.

Thanks & Regards
Nitesh Raghuwanshi