I use Samsung pay at gas pumps.
I now hold it sideways and it works better than holding it vertically.
I don't think android pay will work at gas pumps.
Photo editing has to go through the editor. A simple cropping drops the photo quality and sometimes it even rotates the photo by a degree or so on its own.
I have to put the Samsung logo just below the camera on the card slot. Not the middle of the phone... sometimes I have to try 3 or 4 times but I always get it to work.