Yes, reword that. "Cross-device synchronization" is not a core function, is it? Sending SMS from the web appears to be the only function you are demonstrating.

Yes, reword that. "Cross-device synchronization" is not a core function, is it? Sending SMS from the web appears to be the only function you are demonstrating. By the way, SMS handling is a sensitive topic. Don't be surprised if Google gives you a hard time about this.