I am using 20x with cat18 module and my desire would be to be able to swap SIMs between CAT4 & 18 modems if service is dramatically better in one area versus another.
The 20x is in my campervan where it is physically secured from movement. To access the SIM cards internally will be a huge pain. Requiring lots of effort. So much so that I would not want to do that ever in the field.
Is it possible to use the SIM extender with Balance 20x? To get the CAT4 modem sim cards in an accessible location.