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Internet connection freezes when receiving incoming video calls

Some users notice a strange pattern: the internet works normally for browsing, streaming, or messaging, but the moment an incoming video call arrives, everything stalls. Pages stop loading, ongoing downloads pause, and even other devices on the same network may briefly lose connectivity. Once the call ends or fails to connect, the internet suddenly returns to normal.

This behavior usually points to a short burst of network overload or a routing conflict triggered when the device switches into real-time video communication mode. Incoming video calls force the system to rapidly allocate bandwidth, open multiple network ports, and prioritize audio/video traffic. If the router, connection quality, or device settings cannot handle that sudden change, the connection may temporarily freeze.

Check Network Bandwidth Saturation

Incoming video calls immediately request high upstream and downstream bandwidth. If another device is already uploading files, syncing cloud storage, or streaming in high quality, the connection can choke.

  1. Pause downloads, cloud backups, or streaming on other devices.
  2. Disconnect unused devices from Wi-Fi.
  3. Test receiving a video call again.

If the freeze disappears, bandwidth congestion was the main trigger.

Restart the Router Properly

Routers sometimes mishandle sudden peer-to-peer traffic used by video call apps. A simple reboot clears temporary routing tables and memory leaks.

  1. Turn off the router and modem.
  2. Wait at least 60 seconds.
  3. Power on the modem first, then the router.
  4. Reconnect your device and test again.

Disable SIP ALG or Similar Router Features

Many routers include features like SIP ALG meant to help voice calls, but they often interfere with modern video call services.

  1. Log into the router’s admin panel.
  2. Find settings related to SIP ALG, VoIP helper, or Application Layer Gateway.
  3. Disable the feature and save changes.
  4. Restart the router.

This resolves freezing in many home networks.

Switch Between Wi-Fi Bands or Use Ethernet

Wireless instability becomes more visible during real-time traffic.

  • Connect to a 5 GHz network if available.
  • Move closer to the router.
  • Temporarily test using a wired Ethernet connection.

If Ethernet works normally, interference or weak signal strength is likely involved.

Update or Reset Network Settings on the Device

Corrupted network configurations can cause connection renegotiation failures when video protocols activate.

  1. Reset network settings on the phone or computer.
  2. Reconnect to Wi-Fi manually.
  3. Update the operating system and the video call application.

Optional Alternative: Test a Different Network

Try receiving the same video call using mobile data or another Wi-Fi network. If the issue disappears, the original router or ISP configuration is the limiting factor rather than the device itself.

Once bandwidth conflicts or router handling issues are corrected, incoming video calls should connect smoothly without freezing the entire internet connection.