Is your device connected to the internet?
- Is it in airplane mode?
- Do you have the correct Wi-Fi network and correct password?
- Do you have data on your mobile plan?
Did you register two devices with the same phone number?
Signal can only be registered to one mobile device at a time.
Do you have an app that is limiting or monitoring your connection to the internet?
Try uninstalling the app and restarting your phone before messaging with Signal.
Do you have a firewall, proxy, or third party app monitoring or limiting Signal's connection to the internet?
It is possible that your firewall or mobile provider has blocked access to our servers.
Did you enable permissions for Signal?
Check that you have enabled permissions and do not have restrictions for Signal.
Are you using Android and sending insecure SMS/MMS?
Text messages sent through your mobile SMS/MMS plan are insecure and need your phone to be connected to your mobile network.
- Confirm you have SMS (text) or MMS (Group and media) as part of your mobile plan.
- Enable Signal > Settings > SMS and MMS > 'WiFi Calling' compatibility mode and try again.