Fixes / Zoom · Checked October 1, 2026

Zoom "Your internet connection is unstable": causes and fixes

Short answer

Zoom shows "Your internet connection is unstable" when its own audio stream is losing many packets or data takes too long to arrive. Your speed test result can still look fine. The most likely cause is weak or busy Wi-Fi. Plug in an Ethernet cable or move next to the router, turn off your camera for the rest of the call, and pause any large downloads, backups or streaming.

What this message means

The message is about your own connection, not the other people in the call. Zoom watches the audio stream going between your device and its servers. It shows this warning when the round-trip time goes over 5 seconds, when packet loss stays very high without a break, or when average packet loss goes over 70% three separate times. So a fast speed test does not rule this out. What matters here is steady delivery (latency, jitter and packet loss), not raw speed. Zoom recommends latency of 150 ms or less, jitter of 40 ms or less and packet loss of 2% or less. When the warning shows, you will usually also get frozen video, robotic audio or a dropped call.

Common causes

Cause	How to tell
Weak, crowded or interfered Wi-Fi signal	The warning goes away when you sit next to the router or plug in a cable. Your Wi-Fi icon shows only one or two bars, and the problem is worse in some rooms or when a microwave or other devices are running.
Other apps or devices using up your bandwidth	It happens while cloud backups (OneDrive, iCloud, Google Drive, Dropbox), game or system updates, torrents, or someone else streaming 4K video are running. Pausing those makes the warning stop.
VPN or corporate network routing Zoom traffic the long way	The warning appears only while your VPN is connected, or only on your work network. Latency in Zoom's Statistics tab jumps when the VPN is on.
Router, modem or ISP problems	Every device on your network lags at the same time, other video calls or streams also buffer, or a speed test shows much lower speeds than your plan. Restarting the router helps for a while.
Sending and receiving more video than the connection can carry	The warning shows up in large meetings with many cameras on or when HD video is turned on, and stops when you turn off your camera. Upload speed below about 1.8 Mbps is a common sign, because 720p group video needs 2.6 Mbps down and 1.8 Mbps up.
Outdated network adapter driver or router firmware	Drops keep happening on a good signal, often on a Windows laptop after an update, or other devices on the same Wi-Fi work fine while one computer does not.

How to fix it

1. Free up bandwidth during the call

Click Stop Video in the meeting controls so you only send audio. This usually clears the warning within seconds.
Stop screen sharing if you don't need it, especially if you are sharing video.
Pause cloud sync apps (OneDrive, iCloud Drive, Google Drive, Dropbox), downloads, game launchers and system updates.
Ask others on the same network to pause streaming or large downloads until the call ends.
Close browser tabs that are playing video.

2. Use a cable or a stronger Wi-Fi signal

If your computer has an Ethernet port (or a USB-to-Ethernet adapter), plug it straight into the router. This is the most reliable fix.
If you have to stay on Wi-Fi, move closer to the router with no walls or floors in between.
If your router has a separate 5 GHz network, connect to that. It is less crowded than 2.4 GHz at short range.
Unplug the router and modem for 30 seconds, plug them back in and wait until the internet light is steady before you rejoin.

3. Check your connection with Zoom's Statistics

During a meeting, click the up arrow next to Start Video / Stop Video, choose Video Settings, then click Statistics. Outside a meeting, click your profile picture, choose Settings, then Statistics.
Look at the Audio and Video tabs. Latency should be 150 ms or less, jitter 40 ms or less and packet loss 2% or less. Orange or red values mark the problem.
High packet loss or jitter with a good speed test result points to Wi-Fi or router trouble. High latency alone points to VPN or ISP routing.
For a deeper check, open the built-in Network Connectivity Tool with Ctrl+Alt+Shift+D (Windows) or Cmd+Option+Shift+D (macOS). It traces the path to Zoom's servers, and you can export the results for support.

4. Turn off the VPN and HD video

Disconnect your VPN before the meeting if your company does not require it for Zoom, then rejoin.
In the Zoom desktop app, click your profile picture, choose Settings, then Video & Effects. Uncheck HD.
To cut incoming video in big meetings, go to Settings > Meetings & webinars > Advanced and turn on Enable stop incoming video feature. Then use Stop incoming video from the video options in the meeting. Only your view changes, and others are not notified.
Rejoin the meeting and check whether the warning comes back.

5. Update Zoom, network drivers and router firmware

Driver steps are for Windows 10 and 11. On a Mac, network drivers come with macOS updates (System Settings > General > Software Update).

Update Zoom: click your profile picture and choose Check for Updates.
On Windows, right-click Start, choose Device Manager, expand Network adapters, right-click your Wi-Fi or Ethernet adapter and choose Update driver. You can also get the newest driver from your laptop maker's support site.
Log in to your router's admin page or app, or visit the maker's support site, and install any firmware update.
Restart the computer and test again in a meeting.

6. Fix the underlying network

Run a speed test (Speedtest, nPerf or Comparitech) with nothing else running. Compare the upload speed to Zoom's needs: at least 600 kbps up and down for a basic 1:1 video call, 1.8 Mbps up for 720p group video.
If speeds are well below your plan or drop often, contact your internet provider and ask them to check the line for packet loss.
If the router is far from where you take calls, add a Wi-Fi extender or mesh system, or replace an old router.
On a cable connection, make sure the modem is DOCSIS 3.0 or newer.
On a work network, ask IT to check the Wi-Fi access point and whether Zoom traffic goes through a proxy or VPN.

Next time, skip the search

Crade is an AI assistant for Mac and Windows that sees your screen. When a message like this pops up, ask “what does this mean?” and it explains the exact error in front of you, step by step.

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Still not fixed?

If the warning keeps coming back on a cable connection with the VPN off, run the Network Connectivity Tool (Ctrl+Alt+Shift+D on Windows, Cmd+Option+Shift+D on macOS) and export the results. Then join a test meeting at zoom.us/test to see whether the problem is only in certain meetings. Try the same meeting from a phone on mobile data. If that works, the problem is your home or office network, and your internet provider or IT team needs the exported results. If the phone has trouble too, check status.zoom.us for a Zoom outage and contact Zoom Support with the logs.

Questions people ask

Why does Zoom say my internet is unstable when my speed test is fine?

Zoom judges steady delivery, not speed. A speed test shows peak throughput, but Zoom warns about packet loss, jitter and delay on its audio stream, which Wi-Fi interference or a VPN can cause even on a fast plan.

Can other people hear me when Zoom says my connection is unstable?

Often only partly. Your audio may cut out or sound robotic to others, and your video may freeze. If the connection gets worse, Zoom may drop you and try to reconnect.

Does turning off my camera help with an unstable connection?

Yes. Audio uses about 60 to 80 kbps, while group video can need 1 to 3.8 Mbps. Stopping your video frees most of that bandwidth right away.

Is the problem on my end or the host's end?

This pop-up is about your own connection. Other participants' connection quality shows as the colored signal bars next to their names, not as this message.

Can a VPN cause Zoom's unstable connection warning?

Yes. A VPN sends Zoom traffic through an extra server, which adds delay and can cause packet loss. Zoom's own Wi-Fi guide says to disable the VPN when you don't need it for the meeting.

Sources

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