How many types of Apple iPad mini are there? How many generations? What does wifi version on ipad mean? What's wrong with the 3g version?

There is only one type of ipad mini now, which is mini1. However, 2 is coming out soon and will be launched together with ipad5. WiFi means that you can only use wireless network to connect to the Internet and cannot install mobile phone cards. The 3g version is , can install a mobile phone card, and can use the operator's 3g network, hope to adopt it! It’s not easy to answer questions