If the call connects but one side can't hear, the app may not have permission to use your microphone, or the sound settings may be wrong.
Allow microphone access
iPhone (iOS)
- Open Settings.
- Tap Privacy & Security, then Microphone.
- Turn ZEDSMS on.
Android
- Open Settings → Apps and choose ZEDSMS.
- Tap Permissions → Microphone.
- Choose Allow (while using the app).
Other things to try
- Turn up the call volume and check that your phone is not on silent or muted.
- Check that headphones or a Bluetooth device are connected to the right output.
- Move to a place with a stronger Wi-Fi or mobile signal.
- Close and reopen the app, then call again.
Menu names can differ slightly between phones. If this doesn't fix it, email support@zedsms.com.