Create Curve25519 identities in the next release.
Don't prompt for auto-initiate if push registered (or active V2).
Add preference to disable the SMS channel all together.

1) If the SMS fallback preference is disabled, no outgoing
   messages will succeed via the SMS transport.

2) If the SMS fallback preference is disabled, "mirroring" the
   SMS db state when not the default system SMS app is disabled.