Hi<p>I am looking at building out an app which would allow for secure SMS communication. The idea is to be able to set policies for SMSes which are outbound and guard against potential FCC fines. The challenge is that one side of the communication is over an app and the other side is via generic texting. This is different from WhatsApp and FB Messenger where both parties communicating have the app installed. The main challenge here is to port an existing number to an app. So, if I text a number (XXX-XXX-XXXX), it is routed to the app so the policies can be applied. With Twilio, the app has to be assigned a new virtual number. Is there any service out there that can do this phone # mapping to an existing number? Also, what sort of infrastructure works for implementing use cases where you have generic texting on one side and app based texting on another? Any opinions/experience will be really helpful