Consult Unicom's best online package. A friend told me what a network card is. Looks like 60 yuan 3 G… ...

Unicom has a wireless network card service. This card is as big as a mobile phone card, but it only has the functions of surfing the Internet and sending short messages, but has no telephone function. If you use it on a laptop or ipad (you don't often play online games or watch videos), it is more cost-effective to buy a network card. You can log in to the online business hall to see if there are any activity discounts at present.