Hello, jforti.
Thanks for the clarification.
In fact, I had that topic created before we had
our telephone conversation.
It was a firmware version issue.
It works very well. The interface was activated at the first traffic notice and it was stable. The throughput was just as expected for my 3G ISP/provider on my region.
As a side note, I would like to add that the required firmware needs more flash space than the out-of-box specs offer for that model(or at least the one I had on my hands).