5. Your smartphone camera can test if your remote batteries still have juice.
Point the front of the remote to the camera, look at the phone screen and press some buttons on the remote. Most phone cameras can detect the infra-red light that is invisible to the human eye.
6. Traveling? Take a picture of your contact info in case you lose the page it’s written on.
7. Use your phone to see other angles of your haircut.
8. Take a photo of the content of boxes when moving, so you’ll know what is stored where.
