Do you often run into situations like these?

 

●During a meeting, you want to sync a presentation from your computer to your Android phone for quick reference.

 

●While traveling, you need to view a colleague’s PC screen on your Android device to collaborate remotely.

 

After several attempts, the connection still fails.

 

Don’t worry—3uAirPlayer is designed to solve exactly these problems.

 

This tool offers excellent compatibility, allowing Android phones and Windows PCs to connect freely. Whether you're in an offline environment, a weak network office, or on the move, you can still achieve stable screen mirroring.

 

Follow this beginner-friendly step-by-step guide, and you’ll be able to use it easily after one try.

 

I: Preparation – Install and Log In on Both Devices

 

Before mirroring, install the software on both devices and log in to the same account. This is the key requirement for a successful connection.

 

Android Phone / Tablet

 

1. Open WeChat or your browser.

 

2. Scan the official QR code to download the AirPlayer App.

 

3. Install and open the app.

 

4. Register and log in using your mobile phone number.

 

Windows Computer

 

1. Open your browser and visit the official download page: https://www.3u.com/airplayer

 

2. Download the Windows client.

 

3. Install it and log in with the same phone number.

 

Important Reminder

 

All devices participating in screen mirroring must log in with the same AirPlayer account.

 

If you forget your password, you can quickly recover it using SMS verification.

 

II: Screen Mirroring on the Same Wi-Fi Network

 

Suitable Scenarios

 

●Home or office network using the same router

 

●PC → Android mirroring

 

●PC ↔ PC mirroring

 

Key Advantage

 

●No additional cost

 

●Simple and fast connection

 

Below is an example of mirroring a PC screen to an Android phone.

 

1. Receiving Device (Android Phone)

 

(1) Open the 3uAirPlayer App.

 

(2) Go to the Receive Mirroring page.

 

(3) A 6-digit mirroring code or QR code will appear.

 

(4) Keep this page open.

 

Do not close it.

 

2. Sending Device (Computer)

 

(1) Launch AirPlayer for Windows.

 

(2) Select Cast This Device Screen.

 

(3) Enter the mirroring code displayed on the phone.

 

3. Confirm the Connection

 

(1) Click Confirm on the computer.

 

(2) The phone will display a prompt:

 

“Allow screen mirroring?”

 

(3) Tap Allow.

 

The computer screen will immediately appear on the phone in real time.

 

III: Practical Tips and Best Practices

 

Learning these tips will help your screen mirroring run more smoothly and securely.

 

4 Very Useful Features

 

1. Single-App Mirroring (Privacy Protection)

 

Avoid mirroring the entire desktop.

 

Instead, select Single Application (for example, Excel only).

 

This prevents the receiving device from seeing other files on your computer.

 

2. Independent Control of Image and Sound

 

After mirroring, the receiving device will show a control bar.

 

You can:

 

Tap Rotate to adjust screen orientation

 

Tap Mute to disable mirroring audio without affecting the source device

 

3. Trusted Devices

 

For your personal devices, you can select Trust this device during the first connection.

 

Next time, mirroring will connect instantly without confirmation.

 

4. Wi-Fi Band Matching

 

When using the same Wi-Fi network:

 

Make sure both devices connect to the same frequency band:

 

●Both on 2.4 GHz

 

●Or both on 5 GHz

 

Mixed bands may cause connection failures.

 

4 Common Mistakes to Avoid

 

1. Overloaded Wi-Fi Network

 

Too many connected devices can cause lag during mirroring.

 

Try disconnecting unused devices to free network bandwidth.

 

2. Trusting Public Devices

 

Only enable Trusted Device on personal devices.

 

Never enable it on public computers or unknown phones, to avoid privacy risks.

 

3. Account Mismatch

 

Before mirroring, ensure both devices are logged into the same AirPlayer account.

 

If you see Connection Failed, check the account login first.

 

IV: Frequently Asked Questions

 

Q1: There is no sound after mirroring.

 

Check the following:

 

1. Ensure both device volumes are turned on.

 

2. When mirroring PC → phone, confirm the phone has permission to receive audio.

 

Q2: “Connection Failed” appears after entering the code.

 

Try these steps:

 

1. Confirm both devices are logged into the same account

 

2. Ensure both devices use the same Wi-Fi band

 

3. Restart the AirPlayer app on both devices

 

Q3: Remote mirroring looks blurry.

 

On the sending device:

 

1. Open Settings

 

2. Set Mirroring Quality to HD

 

Ensure your network bandwidth is sufficient.

 

Final Thoughts

 

AirPlayer’s workflow is actually very simple.

 

Whether you are:

 

●Mirroring PC → Android

 

●Mirroring PC → PC

 

you only need to follow the steps once to master it.

 

If you encounter unusual issues—such as:

 

●A prompt not appearing

 

●Device recognition failing

 

you can troubleshoot or seek assistance.

 

For beginners, it’s recommended to start with PC → Android mirroring on the same Wi-Fi network. It’s the easiest method and works in most situations.