In addition to supporting end-to-end encrypted messages and calls with other Signal users, Signal Android can be configured as your default SMS/MMS app. Learn how to distinguish when communication is private (Signal message) or insecure (SMS/MMS).
Insecure media and group messages (MMS) are transmitted through your mobile plan and incur fees as set by your mobile plan. Signal has a size limit of 300kb for sending MMS.
- Confirm you have SMS (text) or MMS (Group and media) as part of your mobile plan and that you are connected to your mobile network.
- Enable Signal Settings
> SMS and MMS > 'WiFi Calling' compatibility mode and try again. - Confirm all the application permissions are enabled for Signal.
- For some devices, if you restart your phone then re-download the MMS, it will succeed.
- Check your other SMS/MMS app. Even if the other app is not open, it may still attempt to retrieve the MMS before Signal can.
- Reconfigure the APN settings for your phone. You may need to repeat this after every OS update and this impacts any MMS app on your phone. Steps to resolve vary by model phone, OS, and provider. Search for your provider specific support page or follow from the list below: