Cross device sent SMS sync #12
Description
When a user Sends a text message on their phone or tablet there should be the ability to allow that sent SMS be sync'd across all of their connected devices.
This is a major feature and may require the inclusion of a sent box in the App.
This may be done multiple ways, using GMail, Drive or possibly even Google Play Game Services. The simpler and more transparent to the user the better, (GMail is the opposite).