These three companies are very big companies in China, and their operating concepts are different. China Mobile will be more stable, China Telecom's network is faster, China Unicom is very good in China's rural areas. Look at your needs.

It's hard to tell which one is the best because all of these three carriers are state-owned companies. The connection performance depends on the area you stay. I have used China Mobile for over 13 years, it works but not that satisfied me. I heard China Unicom offers a better price on the data and the package. I think the best way to get your answer is to let Chinese friends comment what carrier are they using. You can make a basic judgment base on the proportion.