Unicom's IOT card, is it cheap?

Hello! It mainly depends on what application software you usually use. At present, Tencent Dawang Card launched by China Unicom is very cost-effective. As long as the monthly rent is 19 yuan, you will get 300 minutes of free calls in the package. Tencent's exclusive traffic is free nationwide, answering calls is free nationwide, and there is no roaming nationwide. Give you 1gb national traffic every month (valid in that month), and make voice calls outside the package 0. 1 yuan/. For more Internet packages, I suggest you call the local Unicom customer service hotline 100 10 for consultation, or go to the local Unicom business hall for consultation, and the staff will inform you in detail.