Troubleshooting Signal voice and video calls not working
Applies to: Signal Messenger (Android, iOS, Desktop with calling support)
Last updated: September 2025
Problem
Voice or video calls in Signal fail to connect, drop frequently, or have poor quality (e.g., no sound, frozen video, one-way audio). Sometimes the call button is missing altogether.
Solution
Most Signal call issues are due to poor connectivity, app permissions, or blocked VoIP traffic on your network. Adjusting settings usually resolves the issue.
Step-by-step Instructions
Step 1: Check your internet connection
- Test another app (e.g., YouTube, browser) to confirm speed.
- Switch between Wi-Fi and mobile data.
- Restart your router if on Wi-Fi.
Step 2: Update Signal
- Open the Google Play Store or App Store.
- Update to the latest version — updates often improve call stability.
Step 3: Check microphone and camera permissions
- Android:
- Settings > Apps > Signal > Permissions → Enable Microphone and Camera.
- iPhone:
- Settings > Signal → Allow Microphone and Camera.
Step 4: Adjust Signal call settings
- Open Signal.
- Go to Settings > Data and Storage.
- Enable Use less data for calls if your connection is weak.
Step 5: Restart device and app
- Restart your phone to refresh system services.
- Reopen Signal and retry the call.
Step 6: For Signal Desktop
- Ensure your phone is online (Signal Desktop relies on mobile).
- Check OS-level microphone/camera permissions.
Optional Methods or Tools
- Disable VPNs or proxies — they may block VoIP.
- Try another network if your ISP restricts encrypted calls.
- Use headphones or external microphones for clearer sound.
Best Practices / Tips
- Prefer Wi-Fi for calls whenever possible.
- Close heavy apps during calls to save bandwidth.
- Keep Signal and your OS updated for better compatibility.
- If calls remain unstable, switch to audio-only instead of video.
