I tried to remove the Auto APN but with no success.
It seems that the RUTX11 does not boot at all. I only get the pwr green led and the connected cable LAN blinking yellow. At normal startup the other leds goes green on and of but nothing of that happends.
I also tried to restart the router by pressing the small button but no success. This works good when I got it up and running.
So, maybe the problem is not the mobile modem, put the boot process since the wifi is also not working.