OptimaSmart OPS-50D

The OptimaSmart OPS-50D is a budget-friendly mobile phone that runs on Android v4.2.2 (Jelly Bean) operating system. It features a dual-core processor, 256 MB of RAM, and 512 MB of internal storage which can be expanded up to 32 GB with a microSD card. The phone has a 4.0-inch LCD display with a resolution of 320 x 480 pixels and a pixel density of 144 ppi. It also has a capacitive touchscreen with multi-touch support and a screen-to-body ratio of 60.6%.

In terms of connectivity, the OptimaSmart OPS-50D supports 2G networks, Wi-Fi 802.11 b/g/n, Bluetooth v2.0, and dual SIM functionality. It also has USB 2.0 and microUSB connectivity options. The phone features a 2048 x 1536 pixel camera with digital zoom and LED flash, as well as a 3.5mm audio jack, FM radio, and loudspeaker. It comes in black and white color options and has a 1500 mAh Li-Polymer battery.

Pros:
1. Affordable price point
2. Dual SIM functionality
3. Expandable storage up to 32 GB
4. Decent camera with LED flash
5. Lightweight and compact design

Cons:
1. Low RAM and internal storage capacity
2. Outdated Android version
3. Limited network support (2G only)
4. Low-resolution display
5. Average phone battery capacity