- Analysis by KJ David
Coming out of BLU's 2018 unlocked Android lineup, the Vivo X is a 6-inch phablet of flagship-caliber, with emphasis on its quad camera -- or, more accurately, back-to-back dual camera -- setup. Regrettably, it does not manage to shake off the low (for a high-end smartphone) 64GB-only external memory allowance 
that plagues several of its high-end BLU predecessors. It also does not go beyond 64GB of inbuilt storage , despite a good number of other high-end wide-screen Androids starting out with twice that capacity (128GB).
A couple more of the Vivo X's cons include its substandard (among high-end phablets) 1440 x 720 HD+ resolution and consequent 268ppi-only pixel density score , making its large 6-inch facade sound shoddy compared to the displays boasted by the best phablets on the market, many of which have 1080p definitions and pixel density scores of at least 400ppi. Its 18:9 display is not all about drawbacks, though, since it is spruced up by pros like a 520-nit maximum brightness level 
(many comparable models peak at only 400 nits) and a scratch-resistant Corning Gorilla Glass 3 cover glass .
Aside from its big display, the Vivo X's key features include two dual camera systems, one at the back, and one up front for selfies. Its front cam somewhat overshadows the rear-facing setup, consisting of a 20-megapixel Sony IMX376 primary lens and an 8-megapixel depth-sensing deputy camera for things like real-time bokeh effects and wide-angle selfies (up to 120 degrees) . Incidentally, as of this specs-based review, this kind of selfie camera gives the Vivo X a solid chance at a spot in our list of the best smartphones for selfies. On the flip side, its rear-facing camera is composed of a 13-megapixel main lens and a 5-megapixel sub-lens , with BLU's Final Touch imaging software leading its features.
The Vivo X supports its pros and cons with a MediaTek Helio P25 eight-core processor running at 2.6GHz -- one of the fastest smartphone engines as of its 2018 Q1 market entry (Check out some of the fastest smartphones here). Its high-caliber processor is bundled with a Mali-T880 graphics engine and a 4GB RAM that we cannot help but wish had been bumped up to 6GB or even 8GB, given its CPU clock rate and the fact that 8GB-RAM smartphones were gaining some traction in the high-end smartphone category as of its release.
Also among the BLU Vivo X's pros and cons are a 4010mAh battery with 5V/2A quick-charging , both fingerprint and facial recognition systems for phone and data security , and the MAXXAudio technology aiming to optimize the quality of its music output. Dual WhatsApp support and a Split Screen function add a couple of final touches to the Vivo X, which, as revealed by this analysis, is a high-end phablet for users who value photography and performance above anything else.
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