Among Android smartphones, Sony's Xperia Z Ultra has the largest screen at 6.44 inches. This is probably the biggest any smartphone in the upsize race will get.
If it gets any bigger, it will become impractical to use as a phone as it is simply too big to hold in the hand.
The chief advantage of a smartphone with a big screen is that it functions better as a tablet - hence the term phablet.
People love their tablets as they can surf the Net and check e-mail and social-media postings on the go, but let's not forget that a phone is still a phone and must be of a size small enough to fit the hand and the pocket. The Z Ultra barely makes the benchmark in this regard.
It is a very slim smartphone and is both waterproof and dust resistant. The Snapdragon 800 quad-core processor delivers a zippy performance.
However, because of its largish screen, the lengthy unit looks very breakable, especially if placed in the pocket.
Perhaps a better way to use the Z Ultra would be in tandem with the recently launched Sony Smartwatch2. Easily paired with a tap via NFC, the Smartwatch2 will reduce the need to access the Z Ultra, which can then be kept in a safer place than the pocket.
The Smartwatch2 can access e-mail, SMS, Facebook and Twitter alerts, except for phone calls (which only the Samsung Galaxy Gear watch can do). It sells for $288 (resin strap) and $338 (metal strap).
How much: $1,038
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