I just released an update to my Twilio [1] module. Now the module includes a wizard so you can test from the client and I updated the twilio module dependency to use the new API.
https://github.com/LavaLab/trytond-twilio-messages
https://pypi.python.org/pypi/trytonlls_twilio_messages/
Vincent Bastos
Lava Lab Software
Email: vin...@lavalab.com.au
Website: www.lavalab.com.au