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Based on data from users running Speedtest, T-Mobile delivered a median download speed of 212.77 Mbps, outscoring AT&T at 95.08 Mbps and Verizon Wireless at 86.23 Mbps. The Uncarrier also led the pack ...

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Other features include multi-touch screen, slide-out keyboard, Android platform, WiFi, Snapdragon processor, GPS, and a memory card slot.

This update to Samsung's flagship curved-screen phone has a larger battery, memory card slot, upgraded 12-megapixel camera, always-on display, and curved-edge glass on the front and back.

While the best unlocked phones almost certainly support GSM carriers like AT&T and T-Mobile, it’s best to look for devices that work with all the major U.S. providers, including Verizon.

Our editors also may be in touch with follow-up questions. T-Mobile has been in the telecommunications business since 1994 when it was known as VoiceStream Wireless. Today, it’s one of the ...