How to enable USB debugging and OEM unlock for Android devices

Android has an option, USB Debugging Mode, which is only useful when you have installed the Android Development Kit (Android SDK), necessary for the development of Android applications. If you are not an Android developer, this section certainly does not concern you. Enable USB debugging, you can connect your Android to your PC or Mac and transfer the data from Android to the computer or install the application without limitation. However, when you buy a new Android phone, for example, Huawei, Motorola, Samsung, Sony Xperia, Wiko, LG, Google Nexus and so on, USB debugging is not enabled. So, you need to enable USB debugging as soon as you transfer the data to your computer. After enabling USB debugging, you can connect the Android smartphone to the computer to back up data from Android devices to the PC.

Since version 4.2 of Android, the menu Development Options no longer appears in the settings options! It was through this menu that it was possible to enable USB Debugging.

Scroll down the notifications bar, tap Settings → the General tab → About the phone.

Touch the Version Number box seven times . At the end of the seven supports, a message tells you that you are a developer! The option Development Options appears again in the Android settings.

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Now in detail, the tutorial has 3 parts to show you how to enable USB debugging for four different versions of the Android operating system.

Part 1:  Enable USB debugging on Android 5.0 to 7.0
Part 2: Enable USB debugging on Android 4.2 or 5.2
Part 3: Enable USB Debugging on Android 3.0 to 4.1
Part 4: Enable USB debugging on Android 2.3 or earlier

Part 1. Enable USB debugging on Android 5.0 to 7.0.0

For the new Android OS, such as Android 5.0 or later, you can enable USB debugging by doing the following:

1.  Open the Settings menu, tap the “About Phone” option. Scroll to find “Version Number” and press 7 times until the note “You are in developer mode” is displayed.
2. Return to the previous screen, then tap “Options for Developers”. Check the box next to “USB Debugging”. Finally, press “OK” to enable the USB debug mode.

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Part 2. Enable USB debugging on Android 4.2 or 5.2

For the new Android OS, such as Android 4.2 or later, you can enable USB debugging by doing the following:

1. Enter “Settings” and click “About Phone.”
2. Press “Build number” for 7 times until you get a note “You are in developer mode”.
3. Then go back to “Settings” and click “Options for Developers”.
4. The last step, check “USB Debug”

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Part 3. Enable USB Debugging on Android 3.0 to 4.1

If your Android phone is Android 3.0 to 4.1, you can enable USB debugging by clicking “Settings”> “Developer Options”> “USB Debugging”.

Androids with OEM Unlock option (v5.0):

1. Well, of course we start by opening ‘Settings’.
2. Fetch the recently unlocked ‘Developer Options’. If you haven’t read it and Enable it first.
3. Search for ‘OEM Unlock’ in the Developer Options. It should be under the ‘Bluetooth HCI’.
4. And tap on the box right next to it.
5. And that’s it! You can access the bootloader now.