Let's put it this way: You can think of a 3G network card as the SIM card of a mobile phone (in fact, a 3G network card is a combination of the SIM card of a mobile phone and a device called an instrument similar to a USB flash drive).
Netbooks are like buying a card and sending it to a machine. Generally, the machine configuration is very low, and the price does not exceed 3000. It barely manages the basic functions of surfing the Internet, chatting, watching movies and listening to music, which is similar to a mobile phone with a card that can at least send text messages and make phone calls.
But if you play games, draw pictures or apply, netbooks will definitely not work. You can choose a better notebook yourself, and then choose different brands of 3G network cards and packages (equivalent to choosing a better mobile phone and connecting different cards and packages).
Of course, netbooks can watch movies, but they certainly don't look as cool as the good notebooks they bought, such as buffering speed, resolution, loading speed and so on.