Tested for outbound and inbound SMS.
We basically just copied and modified the twilio gateway. All language files (
playSMS/web/plugin/language/en_US/LC_MESSAGES/messages.po was also updated
I would suggest you to create your own project like this:
I'm not saying I wont new gateway plugin at all to the next release, but it seems maintaining a gateway plugin was not easy, therefor a project on their own would be more suitable