Nick 4 years ago https://www.gizchina.com/2020/03/07/android-hidden-codes-these-are-the-secret-codes-of-your-device/amp Share this: QR Codes on Harptabs.comDateFebruary 14, 2012In relation toHarptabs.comBarcode Scanner AppDateAugust 7, 2011In relation toAndroidAndroid Device ManagerDateAugust 21, 2013In relation toAndroid