Image borders not showing.

My photos are no longer showing a border around them. I'm using a simple code:
"style="border: medium solid #212121;"
but nothing shows. Is there a fix or work around for this?

We strip style attribute of images to fix images having e.g. "padding: 25px" that looks well on desktop, but ugly on mobiles. Maybe in next versions it will be either optional, or smart to remove margin/padding only.

No work-around or css fix for this? I have to add the border in photoshop first?

Only by commenting out

in administrator/components/com_mobilejoomla/imagerescaler.class.php