I've come across these little LTE modems that are relatively cheap, they plug in via M.2 ports and claim to connect to LTE services. I have Googled, but have been unable to find the following three answers to my question:-
1. Do these things require an external antenna? Or are simply plug-in-and-go?
2. Where do you insert the SIM card? Looking over the images I can't see where the SIM card goes.
3. How well do these things actually work embedded deep in a laptop? Sounds like an awful place to be receiving and transmitting signals (I assume WiFi/Bluetooth would be placed somewhere near the edge of the laptop?)