What is the network standard of American operators? Which of the three major domestic operators is suitable for use in the United States?

1. There are more than 65,438+080 different operators operating in the United States, of which the largest four are Verizon and AT & amp； T, T-Mobile, Sprint and many other small local operators and virtual operator.

Verizon

Coverage: the network coverage is the best and fastest, claiming to cover more than 90% of the United States. (It should be noted here that the idea of building a network in the United States is different from that in China. The United States pays more attention to return on investment. Cities, scenic spots and highways are covered, but inaccessible places are often not covered. );

CDMA:850MHz， 1900MHz

CDMA EVDO/CDMA2000(3G):850MHz， 1900MHz

LTE(FDD):700MHz (band 13), 1700Mhz (band 4)

Step 2 sprint

Coverage: poor coverage, no problem in big cities, but much worse outside the city;

CDMA:800MHz (band 10), 1900MHz (band 2)

Cdma evdo/cdma2000 (3g):1900mhz (band 2)

LTE(FDD):800 MHz(26 band), 1900 MHz(25 band is preferred).

WiMAX (terminated): 2500MHz

LTE(TDD):2500MHz (band 4 1)

3.T-Mobile？

Coverage: poor coverage, no problem in big cities, but it is much worse outside cities. Because there are few resources such as frequency, the guaranteed speed is often not as good as the first two, and the signal of T-mobile is usually poor in the building (it is said that the frequency band of T-mobile just vibrates with the concrete wall. );

GSM: 1900MHz，850MHz

WCDMA(3G, HspA+):1700/2100 MHz (in pairs), 1900Mhz.

CDMA EVDO/CDMA 2000 (3G):1700/2100 MHz (pairing, preferred), 1900MHz.

Lte (FDD):1700/2100 MHz (pairing, priority, band 4)

4. AT&T Company. T

Coverage: the network coverage is the best and the fastest;

GSM:850MHz, 1900MHz (individual regions)

WCDMA(3G, HSPA+): 1900MHz (priority), 850MHz

LTE (FDD):1700 MHz/2100 MHz (paired, priority, band 4), 1900MHz (band 2), 700 MHz (band17,29).

Second, it is very cost-effective for half of the three major domestic operators to choose GSM.

1, China Mobile can be divided into international roaming and 30-day short-term roaming.

Because China Mobile is divided into several customer brands, the opening conditions of different brands are different: (1) M-Zone, Shenzhouxing and standard cards need to have a general ledger balance greater than or equal to that of 500 yuan, and they need to be pre-stored in 200 yuan in a short time and have been online for more than 90 days. (2) If the users of Shenzhouxing meet the requirements, they can be opened without pre-storage. Pre-stored compensation-free conditions include users with accumulated points of 5,000, more than three stars, and no downtime record for nearly six months in recent ten years. The general ledger balance that does not meet the tax exemption conditions for pre-storage exceeds 1 000 yuan.

What are the international roaming charges of the three major operators? In my impression, the charges for international roaming have been very high. In fact, through efforts, the three major operators have made efforts to reduce tariffs in various regions. For example, China Mobile lowered its international roaming charges three times in a row, and divided international roaming into 1 yuan, 2 yuan and 3 yuan. According to different regions, the charges for making and receiving calls in Chinese mainland are divided into three grades: 0.99, 1.99 and 2.99 yuan/minute. In terms of functions, China Mobile provides basic voice functions. Except for a few countries and regions in Japan and South Korea, most countries can send and receive short messages. In terms of data traffic, the "3 yuan /6 yuan /9 yuan Traffic Packet" is automatically superimposed, which can cover 3M traffic in eight regions including Hongkong, Taiwan Province Province and the United States.

Every day, there is a double roof with a 30 yuan fee of 50M, which ensures that we will not have problems such as sky-high telephone charges. Take Hong Kong as an example to introduce Unicom's international roaming charges. After roaming in Hong Kong, users can make local calls to the Mainland or Hong Kong at a rate of 0.39 yuan per minute. Calls from Hongkong to Macau and Taiwan Province Province are charged at 0.39 yuan per minute, and other calls are charged to 0.2 yuan every 6 seconds. Calls from Hongkong to other countries will be charged "0.39 yuan/minute +0.2 yuan /6s". In terms of receiving short messages, it is free for Unicom to receive short messages, and it costs 1 cent to send short messages to the mainland, while it costs 80 cents for each short message in other countries. Although it seems that the cost calculation is very complicated, most of it is not what we need.

Similarly, let's introduce the international roaming charges of China Unicom's 3G ordinary card: As can be seen from the above figure, the charges of China Unicom are generally low, but in terms of traffic charges, mobile is dominant. In any case, we should choose operators according to our own needs.