Where can I buy SIM card sets in Tianjin? Does Unicom business hall sell it? What is the approximate price?

If you are talking about the wireless network card USIM Kakatuo, it is available in Unicom's business hall. Cato, a wireless network card, will introduce you to several models that support Unicom's 3G network. Huawei E 180, Huawei E 176G, Huawei E880, ZTE MF636, ZTE MF637, ZTE MFE353, Datang Air Card 95 1, Netcom U 19 16, and power generation WM 3000.