3 Useful Android Secret Codes You Need to Know We talk about 3 secret codes that Android phone users can use to test their phone’s features, delete junk files to speed up their phone, and find the original date of use of their phone, which can be useful when buying a second-hand phone. ❤️ @eztechby . . #androidphone #phonetips #smartphonehacks #androidonly | eztechby