I was waiting for it since a long time, now it is ready ! The down-link code is available on the Telecom Design SDK version 5.0.0.
Thank to this upgrade we are now ready to receive 4 messages a day on a device and ready for device actions !
I recommend to reinstall the SDK or at least to clean all the previous build as in my case, updating from github created a lot of build issues.
Stay tuned, I’ll try and give some feedback soon !