By fully back up, I don't mean backing up just. In this tutorial, I will guide you through the easiest and most reliable way to fully and 100% back up and restore your Android phone. While other types of phones may pop up a menu from which you can select an item from the menu list, the Android device uses symbolic representation whose function is the same as the written form of such commands or feature. The Android device is a very smart device which is built to give real flexibility while using it. Note: If ReiBoot for Android cannot detect your Android device, you can try the following guidance to enable USB debugging. Choose "One-Click to Enter Recovery Mode" from the main interface. Step 1 Download ReiBoot for Android on computer and connect your Android device with an USB cable. Then connect your Android device to computer.From the Homescreen go to Settings > More. That is, enable the “Unknown Sources” setting.
To install software anywhere else, you have to enable installation from third-party sources. Out of the box, your Android device only allows you to install apps from Google Play Store.
The issue mostly occurs in Mediatek based Android smartphones.