Apple iPhone 4

The Apple iPhone 4 was released in June 2010 and was a significant upgrade from its predecessor, the iPhone 3GS. The device runs on iOS 4, which can be upgraded to iOS 7.1.2, providing users with access to a wide range of apps and features. The phone is powered by a 1.0 GHz Cortex-A8 processor and Apple A4 chipset, along with a PowerVR SGX535 GPU, ensuring smooth performance for everyday tasks.

The iPhone 4 comes with 8/16/32 GB of internal storage and 512 MB of RAM, providing ample space for storing apps, photos, and videos. The 3.5-inch LED-backlit IPS LCD display offers a resolution of 640 x 960 pixels and is protected by Corning Gorilla Glass with an oleophobic coating. The touchscreen is capacitive, allowing for easy navigation and responsive touch controls.

In terms of connectivity, the iPhone 4 supports GSM and HSPA networks, as well as Wi-Fi 802.11 b/g/n for fast internet speeds. The device also features Bluetooth 2.1, A2DP, GPS with A-GPS, and a USB 2.0 port for syncing and charging. The 5 MP main camera with LED flash and HDR capabilities captures high-quality photos and videos, while the 0.3 MP front-facing camera is suitable for video calls over Wi-Fi.

The iPhone 4 boasts a sleek design with a front/back glass and aluminum frame, available in black or white colors. It also includes a variety of sensors such as accelerometer, gyro, proximity, and compass for enhanced functionality. The device is powered by a 1420 mAh non-removable Li-Po battery, offering up to 14 hours of talk time on 2G and up to 40 hours of music playback.

Overall, the Apple iPhone 4 offers a solid combination of performance, design, and features, making it a popular choice for users looking for a reliable smartphone. However, some drawbacks include the lack of expandable storage, lower resolution front camera, and limited software support due to its older operating system.