How to check whether the mobile phone is used by Unicom?

The method is simple. Find the network standard parameters of the mobile phone. For example, the following figure shows the network standard parameters of a mobile phone. As can be seen from the figure, it supports all network standards of China Telecom, China Unicom and China Mobile, so it is a full netcom mobile phone. Otherwise, it is not.

Brief introduction of mobile phone three netcom

Three Netcom mobile phones, that is, all Netcom mobile phones, that is, "six-mode all Netcom mobile phones", refer to mobile phones supporting six mobile communication systems, including TD-LTE, FDD-LTE, TD-SCDMA, CDMA(EVDO, 2000), WCDMA and GSM(GPRS). Five-mode terminal products that do not support CDMA(EVDO) standard can meet more than 70% of domestic users' needs and can be considered as "quasi-full netcom mobile phones".