Signal Messenger
Encrypted Instant Messaging
Secure Messaging
Message friends and family over Wifi or your data connection. Signal includes audio and video call capabilities.
Installation:
1. Download the APK from the above link and copy to your flashdrive.
2. Insert the flash drive into your Ghost Phone with the USB-C adapter.
3. Tap "Explore" on the notification that appears.
4. Tap Signal.apk
5. Tap "continue" on the popup that appears, then "Install."
6. Enjoy.