Can Unlocked Tmobile Phone Work Verizon more. In our last article, we spoke about things you needed to know about, including the freedom of being off contract, and the wide selection of phones available. We also gave you some insight into phone variants and manufacturer warranties. Now, we’re going to discuss phone frequencies and bands, and walk you through some steps to help assure that your new unlocked phone works with your carrier. A guide to cell network protocols and generations Cell phone network technology is always improving and getting faster. To help customers differentiate between data speeds, many networks and phone manufacturers tend to group things together by generation. You are probably used to seeing the 2G, 3G, and 4G monikers used.

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What you may not know is that each generation contains many different small upgrades, and in the case of GSM and CDMA networks, completely different technologies. Below is a chart outlining the family tree. You may be wondering why there is no 4G CDMA Based Cell Protocol, even though CDMA carriers offer 4G LTE service. LTE is a GSM standard, even though it is used by CDMA carriers like Verizon and Sprint. This is why Verizon and Sprint phones with 4G LTE have SIM card slots. As you can see, there are different types of 2G, 3G, and even 4G.

And, to make matters even more confusing, different carriers and phone manufacturers classify certain protocols as different generations. For example, in the United States, T-Mobile and AT&T brand High-Speed Packet Access (HSPA+) as 4G. This is why Verizon and AT&T's 4G cell coverage maps look so different in commercials. The reason they do this is that HSPA+'s maximum speed of 42 Mb/s is almost as fast as category one LTE at 50 Mb/s. And the fastest CDMA 3G data protocol, EV-DO Rev. A, tops out at 3.1 Mb/s. Unlock Apple Iphone Icloud. So to their marketing teams, it probably made sense to pit 42 Mb/s HSPA+ against 50 Mb/s LTE than the 3.1 Mb/s 3G CDMA network to which customers were accustomed.