Responsive Theme Mobile unresponsive

i am using a wordpress theme called responsive theme i m trying to make the website full zoomed out so customers can zoom in can i do this what do i have to do
update: i made a few changes now some of the pages are zoomed in and some of them are zoomed out i erased this line which was in header.php what else do i need to do to make all pages zoom out please help

See original post by chiller4life