Vivo S1 is a very stylish and premium looking smartphone with innovative gradient design. The material is plastic, but it still feels quite robust in hand because of higher grade polycarbonate material. The display is a 6.38 inches Full HD+ Super AMOLED one with 404 ppi which is one of the main attractions of this device along with the design. So, if design and display quality are on your priority list, this can be a good fit.
The triple 16+8+5 MP rear with a 32 MP front camera setup makes this device also desirable for mobile photography lovers. Furthermore, we have got Ultra HD or 4K video recording facility with the back camera. The wide and ultrawide angle lenses are some of the best features of the rear camera. The front camera comes with portrait mode or bokeh effect. Both cameras can capture overall adequate quality shots during the day and night times.
We have got a 12 nm MediaTek chipset which is a fair deal when combined with 4 or 6 GB RAM and up to 2 GHz octa-core CPU. However, MediaTek is still behind when it comes to long-term steady performance. Graphics intensive programs can start to show a little lag after using them for a long time without any brake. But it is something of a minor issue and it is not as bad as some might think. Multitasking and HD gaming should be smooth in a general sense.