We have a number of activities that use text-in for attendance, and are offered to people (and well attended) outside of the US. This is starting to cause issues for people outside US, and it also makes more work for us :o)
In my discussions with Ethos:
“Currently it’s pretty expensive for clients to use international SMS so there hasn’t been a push for this feature. We are considering building an app so there is no per-user usage penalty.”
Ethos needs to see some rallying to help them prioritize this so I am hoping to hear from others who need international mobile number SMS support!