@dvdivx You can probably try and contact people in these 2 threads:
See if they can tell you if they got it working in the end or not.
Also about the Quectel. Even if the Sierra ones might look inferior, they are not. With the Sierra modules people are getting much higher throughput, close to the spec, while the Quectel modems do not deliver anything even close to spec. They also have buggier firmware on them. That is why the Sierra modems cost 100+ dollars, while the Quectel’s cost just 30 (depending which ones ofc).