I need to buy a SIM at kunming

There are two large companies sell the card, China Mobile and Unicom. They have a lot of branch offices in the city, and you can go one of the, to buy the card. Various data plan is provided, and the work staff will choose the most suitable data plan according to your need. You may need the passport to buy the card. Here is some branch offices for reference.

China Mobile
Located at No. 449 of Beijing Road.
Located at 202 of Middle Renmin Road.
Located at No. 243 of West Dongfeng Road.
Located at Jinbi Road.

Unicom
Located at No. 51 of West Jiangbin Road.
Located at No. 24 of Huguo Road.
Located at No. 601 of East Huancheng Road.
Located at No. 481 of Chuanjin Road.