Someone mentioned good photos. Everyone using OLD or social media should at least have a modern phone but then I see people using iPhone 5 crappy pics. The new phones like the Note 10 Plus for example has an amazing camera and all sorts of modes and editing stuff.
IMO if you're going to use OLD you need a phone with a great camera. These new phones can make you look a lot younger in the face as well hiding acne scars, fine lines and wrinkles, freckles, etc. Why do you think a lot of women on OLD look a lot younger than their listed ages. When you're competing with thousands of others it's gorilla warfare in the trenches. Anything goes in dating.