Vivo X21 review: First phone with in-display fingerprint scanner, amazing camera & battery performance


Vivo X21 smartphone was launched in March 2018. The phone comes with a 6.28-inch touchscreen display with a resolution of 1080 pixels by 2280 pixels. Vivo X21 price in India starts from Rs. 27,191*.

The Vivo X21 is powered by 2.2GHz octa-core processor and it comes with 6GB of RAM. The phone packs 128GB of internal storage that can be expanded up to 256GB via a microSD card. As far as the cameras are concerned, the Vivo X21 packs a 12-megapixel (f/1.8, 1.4-micron) primary camera and a 5-megapixel (f/2.4) secondary camera on the rear and a 12-megapixel front shooter for selfies.

The Vivo X21 is powered by a 3200mAh non removable battery. It measures 154.50 x 74.80 x 7.40 (height x width x thickness) and weighs 156.20 grams.

The Vivo X21 is a Dual-SIM (GSM and GSM) smartphone that accepts Nano-SIM and Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, USB OTG, Micro-USB, 3G and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Fingerprint sensor, Compass/ Magnetometer, Proximity sensor, Accelerometer, Ambient light sensor and Gyroscope.

*Includes Rs. 4,799 cashback

About Vivo

Vivo Electronics Corp. is a phone brand based in Dongguan, Guangdong, China. It was founded in 2009. The company is another Chinese smartphone maker to enter India recently. It makes low-cost Android phones, and those in the mid-range segment of the market. All of these are available in India too.

When you see the X21, you’ll think that this is yet another in a long line of phones with notch displays. But the phone is literally hiding something in plain sight: an invisible fingerprint scanner that sits underneath the display!

This is brand new tech developed by Synaptics (yes, the same laptop touchpad guys) and it requires the use of an amoled display because it takes advantages of the gaps inbetween pixels to scan the fingerprint. It wouldn’t work with traditional LCDs because ..

The first question is why. When smartphone bezels started shrinking, most phones shifted the scanner to the back panel. You might even be used to it on the back. This tech brings it back to the front so that you can unlock your phone while it’s on a table. So how do you know where to press? It helpfully displays a dim fingerprint on the screen as soon as you get near it.

The phone is mostly unremarkable except for that in-display fingerprint scanner. This is officially the first phone ..

Compared to the more conventional capacitive type of fingerprint scanner (which has been perfected over several versions now), this is just the first generation. Which means there are kinks. It takes significantly longer to register a fingerprint. For it to read correctly, you need to press on the screen fairly hard (and it keeps prompting you to do so as well).

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