The Serval Project invites all members of the serval-project-developers Google Group to register with Google Play as a Beta tester of the Serval Mesh app for Android. This will allow you to install the latest Beta version and receive automatic upgrades as new Beta versions are released.
To register as a Beta tester:
If you want to do Beta testing, but do not agree to Google's terms of service, then you can download the latest Beta versions from http://developer.servalproject.org/files/beta/ The instructions for installing an APK file may be helpful.