Why the Connection Failed?

Have You Selected MTP Mode?

Is the USB Cable in Good Condition?

Have You Enabled USB Debugging?

Have You Got USB Driver Installed in PC?

Do the Ports in PC Work?

Any Anti-virus Software Installed in PC?

Why the Connection Failed?

Have You Selected MTP Mode?

Have You Enabled USB Debugging?

Is the USB Cable in Good Condition?

Do the Ports in PC Work?

Any Anti-virus Software Installed in PC?

Have You Got USB Driver Installed in PC?

How to Fix it

Choose MTP Mode

When you connect phone to PC via USB cable, drag down the list in the home screen of your device to select “MTP mode”.

Enable USB Debugging

1.For Android 4.0 or above, you can go to “Settings” > “About Phone” > “Build Number”. Tap it seven times until “You are now a developer” turns up. Then, back to the previous screen and hit the “Developer Options”. Now, check the box next to “USB debugging” to enable it. For other Android versions, please refer to the guide.

2.Use J-code to enable USB debugging.

Connect Android to Another Port in PC with Original USB Cable

Plug Android in the computer via original USB cable which has been factory tested, instead of using third party sourced, non-original cable. You can also switch to another port in PC to build the connection.

Download and Install Appropriate USB Driver on PC

Since you connect Android to computer and the USB driver cannot be installed automatically, you should download and install the proper OEM (Original Equipment Manufacturer) USB driver manually according to the brand of your phone. If the anti-virus software installed in your PC, a note will pop up when you are about to download and install the USB driver. Click “Allow” to get it done.

Connect Android to PC via Wi-Fi

Download AirDroid and start it up on both your Android phone and computer. Sign in the same account in the mobile and desktop AirDroid, you can easily get the Android and PC connected.

How to Fix it

Choose MTP Mode

When you connect phone to PC via USB cable, drag down the list in the home screen of your device to select “MTP mode”.

1.For Android 4.0 or above, you can go to “Settings” > “About Phone” > “Build Number”. Tap it seven times until “You are now a developer” turns up. Then, back to the previous screen and hit the “Developer Options”. Now, check the box next to “USB debugging” to enable it. For other Android versions, please refer to the guide.
2.Use J-code to enable USB debugging.

Enable USB Debugging

Plug Android in the computer via original USB cable which has been factory tested, instead of using third party sourced, non-original cable. You can also switch to another port in PC to build the connection.

Connect Android to Another Port in PC with Original USB Cable

Download and Install Appropriate USB Driver on PC

Since you connect Android to computer and the USB driver cannot be installed automatically, you should download and install the proper OEM (Original Equipment Manufacturer) USB driver manually according to the brand of your phone. If the anti-virus software installed in your PC, a note will pop up when you are about to download and install the USB driver. Click “Allow” to get it done.

Connect Android to PC via Wi-Fi

Download AirDroid and start it up on both your Android phone and computer. Sign in the same account in the mobile and desktop AirDroid, you can easily get the Android and PC connected.

Let Your Android Do Anything after Connecting

Transfer Backup Recover Root Upgrade System Release Internal Storage Install Apps

Extended Knowledge

1

What is USB Debugging?

A function offered by Android primarily serves apps development. With it enabled and connecting Android to computer, you can:

1) Transfer data in between Android and computer. Meanwhile, Android can still function well.

    Example:Connecting phone to the computer and use 3-party desktop software to backup phone contacts and text messages.

2) Install applications on Android

    Example:Use desktop software to download and manage apps on Android

3) Read the log data on Android

    Example:App developer can work on application development and test.

By default, USB debugging mode is closed and you should enable it manually. Tap the “Build number” seven times in a quick speed to activate “Developer Option”. Then, you can check the box next to “USB debugging” to enable it.

2

Why to Enable USB Debugging?

Generally, if you just want to transfer data between phone and computer, you just need to turn on “MTP” mode. In this mode, the computer can read the data on your phone similar to the U flash disk. However, under the MTP mode, you cannot install apps on Android or control it on the computer like that with USB debugging enabling.


mtp

Usage Scenarios of MTP and USB debugging:

1) To only transfer data between Android and computer, just turn on MTP mode.

2) To have control over Android on the computer, such as app installation, data backup or root, enabling USB debugging is required.

3

The Authority of USB Debugging Mode

From the above, we know after enabling USB debugging and connecting phone to PC, the PC will have an ultimate control over the phone. It can read all kinds of data stored in the phone, install apps, root Android as well as break the lock screen password with some downloaded software.

4

The Difference on the USB Debugging Authority between Android and iOS

After connecting Android to PC, on one hand, the computer can read data stored on Android (copy data from or to Android). On the other hand, you can use your phone to download pictures or run apps during the connection.