How to Fix Common NetMirror Problems and Lag Issues

NetMirror is a popular screen mirroring application that allows users to cast their smartphone, tablet, or PC screen onto a TV, monitor, or another computer wirelessly. Whether you’re streaming a game, presenting slides, or watching videos, NetMirror makes screen sharing fast and simple.

However, like any network-based application, users can occasionally face issues such as lag, connection errors, or audio syncing problems. These problems are frustrating—but the good news is, most of them can be fixed with simple troubleshooting steps.

In this guide, we’ll cover the ways to fix common NetMirror problems and lag issues—and show you Bonus Tips to fix them. We’ll also include extra tips to boost your network speed and make your mirroring experience smooth and stable.

Lag, freezing, or connection drops in NetMirror usually happen because of a few common reasons:

• Weak Wi-Fi connection between the devices.
• Network interference from other devices.
• Outdated app version or system firmware.
• Low device performance, especially on older phones or PCs.
• Firewall or antivirus restrictions blocking the connection.
• Incorrect settings on either the casting or receiving device.

Most of these issues can be solved by adjusting network settings, updating the app, or tweaking system performance. Let’s go step by step through each problem and fix.

One of the most common issues users face is when NetMirror simply won’t connect between the phone and the display. This can be due to network configuration issues or app permissions.

Causes:

• Devices are not on the same Wi-Fi network.
• VPN or firewall is blocking the connection.
• The NetMirror app doesn’t have required permissions.
• Outdated app version.

Fix:

1. Check Wi-Fi Network:
   Make sure both your sending and receiving devices are connected to the same Wi-Fi. If one is on mobile data or a different network, connection will fail.
2. Disable VPN or Proxy:
   If a VPN or proxy is enabled, it can block the mirroring signal. Disable it temporarily to allow a stable connection.
3. Allow Permissions:
   On your phone, go to Settings → Apps → NetMirror → Permissions. Make sure Wi-Fi, network, and casting permissions are allowed.
4. Restart Devices:
   Restarting both devices often refreshes network configurations and fixes minor glitches.
5. Update the App:
   Make sure you’re using the latest version of NetMirror for both devices.

Pro Tip: If the problem persists, try resetting your router. A fresh IP assignment can clear up blocked connections.

Even after connecting successfully, you might notice a delay or lag between what happens on your phone and what shows on the display. This is common during gaming or streaming high-resolution videos.

Causes:

• Weak Wi-Fi signal.
• Low bandwidth or network congestion.
• High video quality settings.
• Hardware limitations on the sending device.

Fix:

1. Use a 5 GHz Wi-Fi Network:
   If your router supports dual-band, switch both devices to the 5 GHz band. It’s faster and more stable than 2.4 GHz.
2. Move Closer to the Router:
   The closer the devices are to the Wi-Fi source, the stronger and more stable the connection.
3. Close Background Apps:
   Free up system resources by closing unnecessary apps that might be consuming bandwidth or CPU.
4. Lower Streaming Quality:
   In the NetMirror settings, reduce the screen mirroring resolution or frame rate to match your network’s capacity.
5. Check for Interference:
   Avoid other heavy bandwidth activities like downloads or online gaming during mirroring.

Pro Tip: A wired Ethernet connection to the receiving device can dramatically reduce latency.

Another frustrating issue is when the receiving screen goes black or freezes while mirroring is active. This usually happens because of unstable connections or unsupported video output formats.

Causes:

• Incompatible resolution or refresh rate.
• App glitch or crash.
• Insufficient system resources.
• Temporary Wi-Fi signal loss.

Fix:

1. Restart the Session:
   Stop casting and start the mirroring session again. This refreshes the video pipeline.
2. Adjust Resolution Settings:
   Lower the output resolution in NetMirror settings to something supported by your TV or monitor.
3. Update Graphics Drivers (PC):
   If you’re mirroring to or from a PC, make sure your GPU drivers are up to date.
4. Check Wi-Fi Stability:
   If the Wi-Fi signal drops, the screen can freeze. Move closer to the router or reconnect.
5. Force Close and Reopen App:
   Sometimes, clearing the app cache and restarting it can fix display glitches.

Pro Tip: If using NetMirror on PC, running it in compatibility mode or with administrator rights can solve random black screen issues.

Video without audio is a common mirroring issue. Sometimes, you can see the screen perfectly but hear nothing on the receiving device.

Causes:

• Audio output not set correctly.
• Bluetooth device interfering.
• App permissions disabled.
• Audio codec incompatibility.

Fix:

1. Check Audio Output Settings:
   Make sure your receiving device is selected as the primary audio output.
2. Disable Bluetooth:
   If Bluetooth earphones or speakers are connected to the sending device, audio may not mirror correctly.
3. Enable App Permissions:
   On mobile, go to Settings → Apps → NetMirror → Permissions and ensure microphone and audio permissions are granted.
4. Reconnect the Session:
   Disconnect and reconnect the mirroring session. Sometimes audio channels don’t sync on the first try.
5. Update the App:
   If the issue persists, update NetMirror to the latest version to ensure audio codec compatibility.

Pro Tip: Some TVs or receivers have separate audio settings. Check the audio input mode (HDMI, Miracast, etc.) is set properly.

Occasionally, NetMirror may suddenly crash or close during use. This can be due to compatibility issues, memory problems, or corrupted files.

Causes:

• App bug or outdated version.
• Insufficient RAM or storage.
• Corrupted cache files.
• OS compatibility issues.

Fix:

1. Update NetMirror:
   The latest version often contains bug fixes and stability improvements.
2. Clear App Cache:
   Go to Settings → Apps → NetMirror → Storage → Clear Cache and Clear Data. Then restart the app.
3. Free Up Device Memory:
   Close unused apps or clear storage space to give NetMirror enough resources to run smoothly.
4. Reinstall the App:
   If the crashing continues, uninstall and reinstall NetMirror on both devices.
5. Check OS Compatibility:
   Make sure both devices are running supported OS versions for NetMirror.

Pro Tip: If crashes happen only on certain files or apps, test mirroring a different source. The issue may not be with NetMirror itself.

Even if NetMirror works, optimizing your network can make your mirroring experience much smoother—especially for gaming and streaming.

Expert Tip: If your Wi-Fi is crowded, changing the router’s channel manually can help avoid interference from neighbors.

Using NetMirror for screen mirroring can be a great way to enjoy games, presentations, or media on a bigger screen. But connection drops, lag, and other errors can quickly ruin the experience if not fixed properly. By following the troubleshooting steps above—like checking your network, lowering resolution, clearing cache, and updating the app—you can prevent most issues before they interrupt your session. Pair that with a fast and stable Wi-Fi connection, and you’ll enjoy smooth streaming with minimal delays. Regular updates, proper settings, and basic network optimization will keep NetMirror running efficiently every time.