So after doing quite a bit of research, (although I still really have no idea what I'm doing here!), I'm looking at possibly popping a Sierra MC7700 card into a WWAN sled and giving it a try with my CF-30 MK3. (For testing purposes, I'll probably start out using one of T-Mobile's cheesy prepaid data passes until I can confirm the setup works). For reference, my system is running Windows 10 Pro x64, and as per another topic I read, this should theoretically work just fine if I can find the correct drivers. I'm wondering what people's thoughts are on this, and if they have any recommendations or pertinent information they can provide. My reasoning behind doing so is both for my personal use, and because I would like to potentially integrate such a system into a fleet of vehicles with the same model Toughbook so they have constant high-speed internet access. (Right now the fleet uses cheap laptops we intend to replace, with a "MiFi" hotspot providing 4G LTE data access). As I've also read, this is not directly supported by Panasonic or this particular Toughbook model, but I'm willing to put in the time and money if it is successful. That also being said, I'm not looking to upgrade to newer systems to get around this. _____ I've also read that the MC7700 can connect to multiple carriers, but may not support most of the common 4G LTE bands used now. As far as I can tell, this card is also "end of life". Would I be better off using the Sierra MC7354 instead? I have no problem with paying more for a better card, but I haven't seen anyone else actually try this yet with that card.