We can find that when we connect the device to the PC, sometimes it does not work, the PC screen may ask you to enable debug mode. USB debug mode as a developer allows you to copy data between your phone/tablet and your computer. So, USB debugging is off in the normal state, so you should go to turn it on if necessary, while what is USB debugging works for? The steps to enable USB Debugging mode stays the same Android versions.
ENABLE USB DEBUGGING ON ANDROID 2.3 GINGERBREAD OR NEWER
When you are Having an Android Device with Android OS v2.3 or newer, next you can Enable the USB to Debugging Mode Option Simply by Going through the Following Steps.
Settings > Applications > Development > USB Debugging
Open Your Android Device ‘Settings’.
Here Go to ‘Applications’ Section.
Enable USB Debugging Mode on Android 2.3
Scroll Down to Bottom and Tap on ‘Development Option’.
USB Debugging Mode
Here Just Check Mark the Option ‘USB Debugging’
Enable USB Debugging
That’s all and USB Debugging Mode will be Enabled.
ENABLE USB DEBUGGING ON ANDROID 3.0 TO 4.1
Settings > Developer Options > USB Debugging
If the OS of your Android phone is 3.0 – 4.1, enter “Settings”. Then choose “Developer options” > “USB debugging”.
Settings > About Phone > Build number > Developer Options > USB Debugging
For the newer Android operating system like Android 4.2 or later,
You can enable USB debugging by the following steps:
Step 1. Enter “Settings”, then, click “About Phone”.
Step 2. Click “Build Number” constantly, then you can see developer mode.
Step 3. You should see the Developer Options menu item in your setting list now.
Step 4. Open Developer Options and check USB debugging > Ok