I believe Twilio would be the best people to speak with.Two way requires a lot of setup and may be expensive.https://launchpoint.marketo.com/assets/640-twilio/10217-twilio-sms-for-...
When you say "integration" do you literally mean API integration?Generally what you want to do is ensure your journey map is timed such that your Engagements send at diff times fro...
Sadly this is NOT how to do this. You can check marketingrockstarguides.com I may have written a bit about it.RCE/RCM should be setup as Transitions like "Revenue Stage is Changed ...