A good idea is to use your phone to take a picture of the screen with the picture and the number, and then enter the number at a more convenient time. I am not sure how long the numbers are valid to enter. (When we went to DLR in 2018, I think I ended up adding the photos by entering the number after I was already home.)There are two ways to add a ride photo to your photo pass. You can add them in the app, there is a scanner or you add the number. Currently, there don’t seem to be QR-codes at the screens with the photos, but there used to be and you could scan them to add the photo. Now you just enter the number on the screen. You’ll need internet to add the photo and it has been reported the photo’s added this way have a lower quality.