Hello! Thanks for the answer!
Yes, when used by the non-restricted connection, activation looks stable.
And again, I use to check my devices last Synch info here, at the Emteria Dashboard view, and devices not having any issues on this topic, are the ones that keep updating Synch timestamp almost every day.
That's why I think, by having the address emteria.OS uses to update last synch info in your servers, problem will be solved.
By any chance do you have it?
Thanks a lot. Now I have already 2 devices in this condition.