To unmatch someone on Tinder due to any reason, here are the simple steps you should follow. 1. Open the chat box of the person you want to un-match. 2. Find the Red Flag icon in the case of the iPhone or the Ellipses icon in the case of the Android. It is in the bottom of the top-right corner of your screen. Tap on it. 3. There you’ll see the Unmatch option. Tap on that. This is all you need to do.