It's more expensive not to change roaming. When you go to college, you will basically change your local number. On the day of registration, many Unicom and mobile companies will pull you into the network and compete with each other. . They are basically part-time students. Anyway, at that time, basically 99% of the local numbers were changed, so it was rare to stick to the hometown number. In addition, the business hall in the school can provide various preferential packages, which is quite cost-effective. I didn't want to change when I first entered the university, but later I did as the Romans do.

not bad

Anyway, it's convenient in college.