ADB Mode is a backup screen mirroring solution provided by 3uAirPlayer  for users whose Android driver-based mirroring fails. If the standard driver method encounters issues such as “device not recognized” or persistent connection failures, ADB mode can be used to establish a stable connection.

 

ADB mode works by using the USB Debugging feature in the phone’s Developer Options, enabling deeper communication between the phone and computer. Its main advantages are strong compatibility, the ability to resolve most driver compatibility problems, and low latency performance.

 

This guide is designed for situations where driver-based mirroring fails. It covers the operation steps for major Android brands and helps you quickly enable the backup ADB solution to complete screen mirroring.

 

Important:

ADB mode is not the primary mirroring method. It should only be used when the standard Android driver mirroring fails.

 

Before proceeding, make sure that the 3uAirPlayer client is installed on your computer.

 

I. Required Hardware

 

The following items are required:

 

1. Android Phone

 

Android 7.0 or later is required.

You can check the version in:

 

Settings → About Phone

 

Most modern Android devices meet this requirement.

 

2. USB Data Cable

 

Use the original USB cable or a certified cable that supports data transfer.

 

Cheap charging-only cables will not work.

 

Quick verification method:

 

After connecting the phone to the computer, if the phone shows options like “File Transfer” or “Charging”, it means the cable supports data transfer.

 

3. Windows Computer

 

Supported systems:

 

●Windows 7

 

●Windows 10

 

●Windows 11

 

For best stability, connect the USB cable to the rear USB ports of the computer rather than the front ports.

 

II. Three Common Issues to Avoid

 

1. Do Not Use a USB Hub

 

Connect the USB cable directly to the computer.

 

Using a USB hub may cause insufficient power supply or unstable data transmission.

 

2. Temporarily Disable Security Software

 

Security software such as 360 Antivirus or Huorong may block ADB driver installation.

 

Temporarily disable real-time protection before starting mirroring. You can re-enable it afterward.

 

3. Ensure the Phone Has Enough Battery

 

Make sure the phone battery level is above 30%.

 

Low battery may trigger power-saving mode and interrupt the mirroring connection.

 

III. Enable USB Debugging on the Phone

 

When normal Android driver mirroring fails, the key to using ADB mode is enabling Developer Options and USB Debugging.

 

Developer Options are hidden system settings, and the unlocking steps vary slightly between brands.

 

1.Unlock Developer Options (by Brand)

 

Brand	Path	Operation
Xiaomi / Redmi	Settings → My Device → All Specs	Tap MIUI Version 7 times until “Developer mode enabled” appears
Huawei / Honor	Settings → About Phone	Tap Build Number 7 times
OPPO / OnePlus / Realme	Settings → About Phone	Tap Version Number 7 times
vivo / iQOO	Settings → System Management → About Phone	Tap Software Version 7 times
Samsung	Settings → About Phone → Software Information	Tap Build Number 7 times
Meizu	Settings → About Phone	Tap Version Number 7 times
Realme	Settings → About Phone → Version Info	Tap Version Number 7 times

 

After completing the steps, the system will display a message indicating that Developer Mode has been enabled.

 

2. Enable USB Debugging

 

After unlocking Developer Options, follow these general steps.

 

Step 1: Locate Developer Options

 

Common locations include:

 

Xiaomi / Redmi: Settings → Additional Settings → Developer Options

 

Huawei / Honor: Settings → System & Updates → Developer Options

 

OPPO / OnePlus: Settings → Additional Settings → Developer Options

 

vivo / iQOO: Settings → System Management → Developer Options

 

Samsung: Settings → Developer Options

 

Step 2: Turn On USB Debugging

 

Inside Developer Options, locate:

 

USB Debugging

 

Enable the switch.

 

The switch will turn blue or green.

 

Step 3: Authorize the Computer

 

A security prompt will appear:

 

“Allow USB debugging?”

 

Make sure to check:

 

Always allow from this computer

 

Then tap OK.

 

This step is important. Without enabling this option, you may need to authorize the connection every time you mirror your screen.

 

3. Special Situations (Very Common)

 

Problem 1: No Authorization Popup Appears

 

Try the following steps in order:

 

Step 1: Basic check

 

Unplug the USB cable, wait 3 seconds, then reconnect it (preferably to the rear USB port).

Wait about 10 seconds to see if the authorization pop-up appears.

 

Step 2: Change USB Configuration

 

Go to:

 

Developer Options → Select USB Configuration

 

Choose:

 

●Media Transfer (MTP)

 

Then reconnect the cable.

 

If the pop-up still does not appear, try other options one by one:

 

●File Transfer

 

●RNDIS (USB Ethernet)

 

●MIDI

 

Reconnect the cable after each attempt.

 

Step 3: Restart the Phone

 

If the above steps fail, restart the phone.

 

Developer Options do not need to be disabled.

 

After restarting, reconnect the USB cable and try again.

 

Problem 2: Developer Options Cannot Be Found

 

Some phones hide Developer Options after reboot.

 

Solutions:

 

●Unlock Developer Options again using the steps above

 

●Search “Developer Options” in the Settings search bar

 

4. Prevent Debug Authorization from Expiring

 

By default, Android automatically revokes USB debugging authorization if the phone has not connected to a computer for 7 days.

 

To prevent this:

 

1. Open Developer Options

 

2. Find Disable ADB Authorization Timeout

 

3. Enable this option

 

Once enabled, the authorization will remain permanently valid.

 

IV. Start ADB Screen Mirroring (Computer Side)

 

After enabling USB debugging on the phone, you can start ADB mirroring from the computer.

 

Ensure the phone remains connected via USB.

 

Step 1: Enable ADB Mode

 

Open 3uAirPlayer on your computer.

 

Click the Settings icon in the top-right corner.

 

Find Mirroring Mode, then select:

 

ADB Mode

 

Click OK.

 

(Some versions place this option under Connection Settings.)

 

Step 2: Wait for Device Detection

 

The software will automatically scan connected devices.

 

Once detected, your phone model (for example, Xiaomi 14 or Huawei Mate 60) will appear in the Device List.

 

Step 3: Start Screen Mirroring

 

Click Start Mirroring.

 

Your phone screen will now appear on the computer.

 

ADB mirroring has been successfully enabled.

 

V. Useful Operations During Mirroring

 

Adjust Video Quality

 

Click Quality on the right side of the software to switch between:

 

●Standard

 

●High

 

●HD

 

HD mode is recommended for gaming and livestreaming.

 

Screen Recording

 

Click Record to save the mirrored screen as an MP4 video.

 

By default, recordings are saved in:

 

Documents → Aisi Screen Mirroring

 

You can change the save location in Settings.

 

Screenshot

 

Click Screenshot to capture the current mirrored screen instantly.

 

This is useful for saving important information or memorable moments.

 

VI. Troubleshooting

 

These solutions apply specifically to ADB backup mirroring mode.

 

If the issue persists, contact official support:

 

email: 3uAirplayer@gmail.com

 

Error: “USB Debugging Not Enabled”

 

Solutions:

 

1. Confirm Developer Options are unlocked

 

2. Ensure USB Debugging is turned on

 

3. Reconnect the USB cable and re-authorize

 

4. Restart both the phone and the software

 

Mirroring Disconnects Frequently

 

Try:

 

1. Use the original USB cable

 

2. Connect to the rear USB port

 

3. Disable phone power-saving mode

 

4. Enable Disable ADB Authorization Timeout

 

Screen Lag or Delay

 

Solutions:

 

1. Close unnecessary background apps on the phone

 

2. Reduce mirroring quality on the computer

 

3. Ensure computer CPU usage is below 80% (check Task Manager)

 

VII. Important Notes and Security Tips

 

Privacy Protection

 

Before mirroring, close sensitive pages such as:

 

●Password screens

 

●Payment apps

 

After finishing mirroring, it is recommended to disable USB Debugging to prevent unauthorized access.

 

Driver Issues

 

If the computer repeatedly reports driver installation failure, download the corresponding Android drivers from the Aisi official website and install them manually.

 

System Updates

 

If mirroring fails after a system update, simply re-enable USB debugging and ADB mode.

 

Usage Recommendation

 

ADB mode is a backup solution when standard Android driver mirroring fails.

 

Under normal circumstances, it is recommended to use the standard driver mode first.

 

Only switch to ADB mode when:

 

●Driver compatibility fails

 

●Android devices cannot be recognized

 

Thanks to its low latency, ADB mode is also suitable for gaming livestreams and professional demonstrations.