Actually, it mainly depends on your usage. If you surf the Internet more, Unicom's 3G network function will obviously be a good choice. If you use a lot each month, especially on the phone, Unicom's 3G package is also worthwhile. There are three types: Class A traffic is more, and domestic call duration is shorter. On the contrary, Class C can be understood as an extension of Class B, and the call duration is changed from domestic call to local call, but it is longer. And if the usage is small, such as ten or twenty yuan per month, Unicom's 3G package may not be so suitable. If the phone bill is low, mainly answering the phone, then mobile 2G will be a better choice, so it depends on your usage.