When I attempt to view an RTT transcript of a call in the dialer that ships with Graphene, I get this crash:

D AndroidRuntime: Shutting down VM
E AndroidRuntime: FATAL EXCEPTION: main
E AndroidRuntime: Process: com.android.dialer, PID: 9455
E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android.dialer/com.android.dialer.rtt.RttTranscriptActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
E AndroidRuntime: 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4061)
E AndroidRuntime: 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4248)
E AndroidRuntime: 	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:112)

After a very brief look, it seems like a theme is never set on the RttTranscriptActivity. Perhaps the fix as simple as setting the theme on that activity to Dialer.ThemeBase.ActionBar?

    other8026 Looks like I can't do that without a github account which I would rather not create at this time. If you could do it, I would be much grateful.

      Looks like it was fixed and the fix should be included in the next OS update.