Sony is all set to announce the Xperia Z1S next month, but is it a variant of the Z1, the Z1 f, or something entirely different? The above image was leaked accidentally on Sony’s website, and it looks awfully familiar to the Xperia Z1 f, except for a couple of differences. First, the front-facing camera is on the left side as opposed to the right side on the Xperia Z1 f.
Not quite a year ago at CES 2014, Sony explicitly indicated they believed the market for flagship smartphone development was going to be on a semi-annual basis, so that is what they set for an internal target. After the release of the Xperia Z2 early in the year, Sony did indeed follow-up about six months later with the Xperia Z3.