To say that Sony is participating in the current “if it isn’t broke, don’t fix it” trend would be an understatement if you’ve been keeping track of their hero Xperia smartphone lineup. In the Xperia Z1S, we’ve got essentially the same build as in the internationally-aimed Xperia Z1, here coming to T-Mobile with the carrier’s Uncarrier plans attached, and just as much power as the original. In other words – if you liked the Xperia Z and were looking forward to the just that-much-better Xperia Z1 “Honami”, this is your winning ticket.

Hardware

The Xperia Z1S works with a 5-inch Full HD (1080p) touchscreen display that looks just as excellent as it did when we first got our hands on this device’s international version back at IFA 2013. Here we’ve got a Qualcomm Snapdragon 800 quad-core processor clocked in at 2.2GHz as well, meaning you’re still rolling with the highest in smartphone-based processor powers available today.
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https://www.slashgear.com/t-mobile-sony-xperia-z1s-review-21313736/