The cheapest flow card in Shaoyang.

Unicom Unlimited Space 19 yuan Package Flow Card has the highest cost performance.

Running water card is also called IOT card. IOT card is a mobile communication access service provided by the three major operators for IOT users, providing basic communication services such as wireless data, voice and short messages for IOT terminals, and providing operational services such as communication connection management and terminal management for IOT customers. To put it simply, operators sell traffic cheaply to large companies, which form a traffic pool and sell cards, and users recharge through the WeChat public platform corresponding to each company.