Hi Guys, 
Anyone here that has experiences with the MX68CW 4G modem? 
I am would like to understand how good is the build in  3/4G  antenna ( Assuming to have an optimal coverage from the supplier in the location), do you have experiences on use it within a rack / enclosure,  and if this specific model has the possibility to plug in an external LTE antenna in case I need to boost the signal.
thank you in advance for your help!