Aligator S5540 Duo

The Aligator S5540 Duo is a budget-friendly smartphone with Android 9.0 Pie operating system. It comes with 2GB of RAM and is available in two internal memory options: 16GB or 32GB. The device supports nanoSIM and microSIM cards, as well as memory cards up to 512GB for additional storage.

The phone features a 5.5-inch Color IPS TFT display with a resolution of 480 x 960 pixels, offering vibrant colors and sharp images. The display is protected and the touchscreen is responsive for easy navigation. NFC, Bluetooth v4.2, GPS, GPRS, EDGE, WiFi, and DLNA are all supported for connectivity options.

The main camera on the Aligator S5540 Duo is 8MP with LED flash and autofocus, while the selfie camera is 2MP with a flash feature as well. The device also has a radio for entertainment, and a 2500mAh battery with quick and wireless charging capabilities.

In terms of sensors, the phone includes an accelerometer, altimeter, barometer, fingerprint scanner, gravity sensor, gyroscope, hall-effect sensor, hygrometer, iris scanner, magnetometer, proximity sensor, and thermometer for added functionality.

Pros:
- Affordable price
- Android 9.0 Pie operating system
- Expandable storage up to 512GB
- NFC and Bluetooth connectivity
- Quick and wireless battery charging
- Wide range of sensors for added features

Cons:
- Limited RAM and internal memory options
- Low-resolution display
- Basic camera specifications
- Average phone battery capacity