Device to have my laptop/desktop connect to internet via 4G LTE and USB port
What I want is a device as shown in this video: https://detail.tmall.com/item.htm?spm=a230r.184.108.40.2066565d6jyezj3&id=571981667167&ns=1&abbucket=9
It is a device that can insert into USB port of my laptop/desktop like a flash disk. After I insert a 4G SIM car into the device, the device will receive 4G signal and communicate with the laptop/desktop through the USB port so that the laptop/desktop can connect to internet. My questions are: 1) What is the formal English name for this device? 2) Does AT&T have any data plan or service that supports this device and this type of internet connection? Thank you.
PS: I'm not talking about wifi. My laptop/desktop has no capability to receive any 4G data signal. Also I'm not talking about hotspot.