Techologie- Ill be honest, when I first got my Galaxy S3 I had no idea what all you could do with it. I mean I knew it was open source and that you could install pretty much whatever you wanted on it. Being a long time iPhone user I had no idea what the world of Android was like. Everyday I find something out about my phone that surprises me. Just today I found out how to access a secret hidden menu that lets you run tests and diagnostics to check for any issues with your. Some of the things these tests can check include the camera, gyroscope sensors, touchscreen and much more.