Vivo X1S

The Vivo X1S is a sleek and stylish mobile phone that runs on the Android 4.2 Jelly Bean operating system. It is powered by a MediaTek MT6589 processor clocked at 1.20 GHz with four cores, along with a PowerVR SGX544 MP1 GPU. The device comes with 1 GB of RAM and 16 GB of internal storage, which can be expanded up to 32 GB using a microSD or microSDHC card.

The Vivo X1S features a 4.70-inch color IPS TFT display with a resolution of 720 x 1280 pixels and a pixel density of 312 ppi. The screen-to-body ratio is 65.4%, providing a good viewing experience. The device also has NFC, Bluetooth, GPS, GPRS, EDGE, WiFi, and DLNA connectivity options.

In terms of camera capabilities, the Vivo X1S sports an 8 MP main camera with LED flash and autofocus, as well as a 1.3 MP selfie camera with flash. The main camera can capture high-quality images at a resolution of 3264 x 2448 pixels and record videos in 1080p resolution.

Other features of the Vivo X1S include a radio, quick and wireless battery charging, various sensors such as accelerometer, gyroscope, and proximity sensor, as well as a fingerprint scanner and iris scanner for enhanced security.

Pros:
- Sleek and stylish design
- Good camera quality
- Expandable storage
- NFC support
- Quick and wireless battery charging

Cons:
- Limited RAM capacity
- Outdated Android version
- Average phone battery capacity

Overall, the Vivo X1S is a decent mid-range smartphone with a good display, camera, and connectivity options. However, it may not be suitable for heavy multitasking or gaming due to its limited RAM capacity.