According to a new report out of Samsung's home country of South Korea, the Galaxy S7 will be unveiled in January. Since the Galaxy S6 and S6 edge made their debut on March 1 this year, that means the S7 is going to be announced at least one full month early. This apparently has to do with the competition that Samsung is feeling in the high-end space, especially from Apple and its new iPhone 6s and iPhone 6s Plus.
The rumor goes on to say there will be a premium and a sub-premium version of the Galaxy S7, and that the designs have been finalized already in September. The premium model's Exynos chipset will reportedly house the processor and the modem on a single chip, while in the sub-premium handset they will be on different dies. The former SoC might be the Exynos M1 we've seen benchmarked recently, but that's not 100% certain - especially as past mumblings had it ready for production only in the second half of next year.
Other previously leaked information talked about there actually being three different chipset variations employed by the Galaxy S7. The phone might also come with 3D Touch-like features, as well as a USB Type-C port.
Samsung Galaxy S7 to be announced in January - SamMobile
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http://www.sammobile.com/2015/10/19/report-samsung-galaxy-s7-to-be-announced-in-january/
