Specifications The Vivo X21 has a lot of good things going for it, but first let’s harp a little about its main USP. With the in-display fingerprint reader embed, there is no round or oval physical space/key anywhere on the phone that the user would need to tap to unlock the it. Instead one has to press lightly the bottom middle part of the touchscreen. A sensor lies here and it reads the fingerprint as soon as you tap on it. Pretty neat, if you ask us. As for the other specifications, the Vivo X21 features an edge to edge 6.28-inch FHD+ super AMOLED touchscreen (2,280×1,080 pixel resolution). This has an aspect ratio of 19:9. 6GB of RAM and 128GB memory is placed on a Qualcomm Snapdragon 660 chipset, which for us is slightly off-putting as the other smartphones in the bracket have Qualcomm 835 and even 845 chipsets powering them. Moving on, the smartphone does support additional storage and one can install a microSD card up to 256 GB in this device. Vivo X21 does come with a dual-camera setup at the back powered by a 12MP+5MP sensor combo. The front snapper is also powerful enough to take good selfies, as this one get a 12MP sensor too with f/2.0 aperture. Powering Vivo X21 is a 3,200 mAh battery with fast charge support. Other features include dual-SIM support, Bluetooth 5.0, Android 8.1 Oreo with Vivo’s own Funtouch OS 4.0 over it. This smartphone will be Flipkart exclusive and comes in gold colour option for the Indian market.