[vel0city]

Many Thinkpads have LTE modems from the factory, with a SIM tray on the side. It is not even just a Thinkpad thing, many manufacturers of enterprise laptops ship plenty of devices with SIM card slots. I've had HPs and Dells come with GSM modems since 3G was a shiny new thing. It is not that its ugly, it is probably not something most consumers have demanded, so they haven't bothered including. Or, the OEMs use it as a differentiator from their consumer tier devices to their enterprise devices.