Comprehensive Review of verykool s4009 Crystal Specs Prices Pros & Cons

Network and Connectivity

The verykool s4009 Crystal supports basic connectivity options typical of its time. Equipped with GSM and HSPA technologies, this smartphone can connect to 2G and 3G bands. For 2G, it supports GSM frequencies of 850, 900, 1800, and 1900 for both SIM 1 and SIM 2. When it comes to 3G, the device is compatible with HSDPA 850, 1900, and 2100 bands, offering HSPA speeds of up to 21.1/5.76 Mbps. While lacking modern LTE capabilities, these connectivity features were sufficient for users in 2017 seeking reliable mobile communication.

Design and Build

The verykool s4009 Crystal is designed with practicality and simplicity in mind. With dimensions measuring 127 x 66 x 10.7 mm, it is compact enough to fit comfortably in one hand, a feature that appeals to users preferring smaller-sized devices over contemporary larger screens. It supports Dual SIM (Mini-SIM and Micro-SIM) with dual stand-by capabilities, enhancing its functionality for users needing two different lines. The phone's design combines utility and style, available in Black and Gold colors, despite the absence of specific weight data.

Display Features

The display of the verykool s4009 Crystal measures 4.0 inches, utilizing a TFT screen technology. While not as advanced as modern displays, the screen’s resolution of 480 x 800 pixels provides a decent display density of approximately 233 ppi. The screen-to-body ratio of around 54.3% suggests a presence of significant bezels, a common trait in smartphones from its release era.

Performance and Platform

Powered by Android 6.0 Marshmallow, the verykool s4009 Crystal offers a user-friendly operating system noted for its efficient performance and support for various applications available on the Google Play Store. It incorporates a Mediatek MT6570 chipset built on a 28 nm process, housing a dual-core 1.3 GHz Cortex-A7 CPU, which ensures the execution of basic tasks with minimal lag. The Mali-400 GPU supports graphic processes, which is suitable for light gaming and standard multimedia content consumption.

Memory and Storage

The device comes with 512MB of RAM, which might be limited by today's standards but was adequate for lightweight applications and tasks in 2017. It provides 8GB of internal storage, a humble amount by any standard, but it includes a microSDXC card slot for expandable storage, addressing potential concerns about space constraints.

Camera Specifications

The verykool s4009 Crystal is equipped with a 5 MP rear camera featuring an f/2.4 aperture. It is accompanied by an LED flash and panorama capabilities, allowing for reasonable photo quality under good lighting conditions. The camera can record videos at 720p at 30fps, offering basic video recording functionality. Additionally, a 2 MP front camera is available for selfies and video calls, though it lacks advanced features seen in higher-end smartphones.

Sound and Audio

The audio experience on the verykool s4009 Crystal includes a loudspeaker for calls and media playback. It also retains a 3.5mm headphone jack, a feature that has become less common in modern smartphones, allowing users to connect traditional earphones without needing an adapter.

Communication Features

In terms of wireless communication, the phone supports Wi-Fi 802.11 b/g/n and Wi-Fi Direct functionalities, facilitating connectivity to wireless networks and sharing capabilities. Bluetooth 4.0 with A2DP and LE is available for connecting various peripherals and transferring files wirelessly. GPS support ensures location-based services can be utilized, although NFC is not included. The inclusion of a stereo FM radio adds entertainment options, especially for areas with good FM coverage.

Additional Features and Sensors

The verykool s4009 Crystal is equipped with an accelerometer sensor, which aids in automating transitions between portrait and landscape modes and measuring acceleration forces. This basic sensor setup reflects the device's focus on offering essential smartphone functionalities without excess.

Battery Life

The device houses a removable Li-Ion 1200 mAh battery, enabling users to replace or service the battery if needed easily. Although smaller by today's standards, the battery life provides up to 150 hours in standby mode (3G) and up to 4 hours of talk time (3G), making it suitable for users requiring moderate daily usage without frequent recharging.

Color Variants and SAR Ratings

The verykool s4009 Crystal is available in two color variants: Black and Gold. These options offer a classic look and feel, catering to different user preferences. Regarding safety, the phone possesses a Specific Absorption Rate (SAR) of 1.13 W/kg for the head and 0.81 W/kg for the body, adhering to regulatory standards to ensure user safety from RF exposure.

Conclusion

The verykool s4009 Crystal, released in June 2017, represents a budget-friendly smartphone option designed to fulfill the basic needs of users who prioritize essential functionalities over advanced features. Its compact design, adequate performance powered by a dual-core processor, and the presence of dual SIM support appeals to users who seek simplicity and functionality. While the advancement in smartphone technology has rendered it obsolete by today’s standards, at its time, it catered well to its intended audience, offering a sufficient balance between price and functionality.