I am using below code to get the wordpress attachment image

wp_get_attachment_image_src($img,'full')

I am getting the image in the full resolution I am using it to display the images on a owl carousel the image looks fine on the desktop but on the mobile the image looks blurry I have checked the image source and its fetching 150×150 thumbnail in the mobiles.

Is there any way I can fetch the full resolution image on the mobile.