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!  ... View more