Dear Bernt and users!
I had very problematic days with geting this system to work, Bernt knows it...
Finally I share my final, working setup. The mist important thing is you should use Hilink mode modem, Stick does not reconnected for me. Second: when there are 2 different isp's sim used, the connection interrupted frequently, after useing the same provider's sim, the problem solved, in a city rhe plane us in the car, so not too ideal conditions, the video was absolutely usable and continous.
Thx Bernt for your help so far