U.S. 4G/LTE cellular modem/gateway that does SMPP or POST for SMS?

U.S. 4G/LTE cellular modem/gateway that does SMPP or POST for SMS?

Has anyone found a cellular modem/gateway that supports SMPP or POST for sending SMS messages from OpManager 12.3? I want a solution that has no external network dependencies, so I can't use a hosted SMS provider. Thanks!

                  New to ADSelfService Plus?