How to use the 4G mobile phone calling card for American travel?

If you are traveling for a short time, you can use a domestic calling card instead of buying a local calling card in the United States. Bring a mobile phone with international roaming (make sure this mobile phone can be used in the United States before going out, and most mobile phones on the market can be used at present), and the mobile phone can receive short messages. Yes, if there is no emergency in the domestic call, you can record it first, and wait until there is a wireless network (WIFI in North America is far more common than in China, so surfing the Internet should not be a problem. At least the hotel must have it. ), you can use a variety of contact tools to contact each other: such as VoIP, Skype, WeChat. \x0d\ Actually, it's not very expensive to make a phone call in America, and it doesn't cost much to make a few phone calls in a hurry. \x0d\\x0d\ For example, China Mobile in the United States manually selects T-Mobile's network, and the fees are as follows: SMS reception, sending CNY0. 19/ message in China, calling CNY0.99/ minute in China and CNY0.59/ minute in the United States. \x0d\\x0d\ If you want to buy it, you can buy CTExcel US from China Telecom USA, or cooperate with American T-Mobile (you can use CTExcel calling card within the coverage of T-Mobile network. ), providing cost-effective communication methods for China students, visiting scholars and short-term visitors to the United States: including unlimited calls in the United States, calls between China and the United States exceeding 1000 minutes, unlimited domestic and international short messages in the United States, and unlimited Internet traffic in the United States (including at least 100 MB 4g/3g traffic). The low-cost package (as low as $ 19) can also provide a virtual China number, and international calls to domestic virtual China numbers are free. \x0d\\x0d\ Now you can buy American calling cards directly online in China, and you don't have to wait until you arrive in the United States to go to a local physical store to buy them.