GOIP appears to be a network to GSM gateway, however GSM is dead in an awful lot of places these days. And SMS marketing should die ;). But, it seems like this functionality (if you don’t want to use something like Twilio) could be implemented as a phone app, rather than requiring a special piece of hardware.
GOIP appears to be a network to GSM gateway, however GSM is dead in an awful lot of places these days. And SMS marketing should die ;). But, it seems like this functionality (if you don’t want to use something like Twilio) could be implemented as a phone app, rather than requiring a special piece of hardware.