Do Unlocked Phones Work With All Carriers

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Best unlocked phones that work on Verizon, Sprint and all other US carriers out of the box; Best unlocked phones that work. Unlocked, would work on all US carriers. Unlocked cell phones work with GSM enabled phones, so any carrier that services GSM phones should support unlocked cell phones.

Making Sense of it All - GSM vs. + AT&T, Verizon, Sprint, US Cellular, T-Mobile. So many carriers - will this phone work for me? GSM vs CDMA - Phone Frequencies Wireless carriers in the United States operate over two different networks: Code Division Multiple Access (CDMA) and Global System for Mobile Communication (GSM). Though each technology transmits voice and data, they do so in different ways, making a phone incompatible if you do not have the right plan.

As a result, you can't take a CDMA phone and use it on GSM or vice versa. GSM phones can be taken to use in other countries as well (as long as the frequency is compatible - please see section below on dual band / tri band / quad band phones). Help make this guide easier for others to find. Please make sure to mark 'Yes' to was this guide helpful in the blue bar area below this guide. Verizon, Sprint, Nextel, Cricket and Alltel all operate using CDMA networks. The item description will say the CDMA carrier that the phone will work on.