The United States uses telecom mobile phones.

1. Telecom mobile phones can be used in the United States. Currently, the United States supports cdma and GSM networks. But the tariff is different;

2. Two people. CDMA network: 4.99 yuan/minute for calling Chinese mainland or other countries/regions, 2.99 yuan/minute for making local calls and answering calls, 0.49 yuan/message to Chinese mainland, 1. 19 yuan/message to other countries/regions, and 0.008 yuan /KB for internet access.

3. three GSM network: call Chinese mainland 0.99 yuan/minute, call other countries/regions 4.99 yuan/minute, make local calls 2.99 yuan/minute, answer calls 0.99 yuan/minute, send short messages 0.49 yuan/piece to Chinese mainland, and send short messages 1. 19 yuan to other countries/regions.