Before this the R9 had a 13 MP camera on the back and a 16 MP unit on the front and the R9 Plus went with a pair of 16 MP sensors, this time around every single camera on the R9s and R9s Plus is 16 MP.
The rear unit for both phones has f/1.7 aperture, electronic image stabilization in the R9s and optical image stabilization in the R9s Plus, 4K video capture support, and a LED flash. The selfie snapper on the other hand has to make do with an f/2.0 aperture.
The R9s is the smaller of the two metal-clad devices, with a 5.5-inch 1080p display and Snapdragon 625 processor, while the R9s Plus comes with a 6-inch 1080p screen and Snapdragon 653 chipset.
Both R9s and R9s Plus make use of a combined fingerprint sensor / home button and benefit from OPPO’s proprietary flash-charging system VOOC – said to boost devices by 75 percent in 30 minutes – for their respective 3,010mAh and 4,000mAh batteries.
Rounding off the vital specs is 4GB RAM for the R9s and 6GB RAM for the R9s Plus, in addition to 64GB internal storage space expandable via microSD card (up to 128GB).
Source : androidauthority