What is the difference between Xiaomi mobile phone bare metal, Unicom version and telecom version? Please elaborate, especially the telecom version.

The functions of mobile phones are similar, and there is not much difference. The main difference is that they support different network modes. The network modes supported by bare-metal and Unicom Xiaomi phones are GSM and WCDMA, which are compatible with mobile and Unicom networks, and can use mobile 2G cards and Unicom 2G and 3G cards. The network mode supported by Telecom Edition is CDMA2000/WCDMA/GSM, while Unicom uses, but you should pay attention. If it belongs to a telecom contract machine, you can only use a telecom card.