The Celkon A402 is a smartphone that was announced and released in June 2015. Though discontinued now, it remains a notable device from the era of early Android phones. Understanding its specifications offers insight into the evolution of smartphone technology and helps appreciate the advancements that have occurred in the smartphone industry since then. This article explores the various features and specifications of the Celkon A402 in detail.
The Celkon A402 measures 125.5 x 64 x 10.2 mm (4.94 x 2.52 x 0.40 in) and weighs only 104 grams (3.67 oz), making it a lightweight and compact device easily portable in any pocket. It comes equipped with Dual SIM capability, accommodating two GSM networks which is particularly useful for users who need to manage separate business and personal lines.
The phone's body is available in four colors: White, Black, Blue, and Silver, offering a good range of options for style-conscious users. The design features soft rounded edges, providing a comfortable grip.
The Celkon A402 is equipped with a 4.0-inch display with a resolution of 480 x 800 pixels, resulting in a pixel density of approximately 233 ppi. The screen-to-body ratio is around 56.7%, which is typical for devices of this era. The type of display used is a TFT screen capable of showcasing 256K colors, which provides adequate vibrancy and brightness for a budget smartphone.
Powered by a Spreadtrum 7715 chipset, the Celkon A402 houses a CPU clocked at 1.2 GHz alongside a Mali-400 GPU. Running on Android 4.4.2 KitKat, it delivers a reliable user experience for everyday tasks such as browsing, basic multimedia consumption, and social media. The phone comes with 512MB RAM, which, albeit modest, suffices for the basic multitasking expected from devices at the time.
The phone's internal memory is limited to 4GB, which can fill up quickly with apps and media. However, the presence of a microSDHC card slot allows users to expand storage capacity, ensuring there is ample space for additional apps, music, and photos.
On the photography front, the Celkon A402 features a 3.15 MP rear camera with an LED flash, capable of capturing basic images and video. The phone also includes a 1.3 MP front camera for selfies, which was a standard feature at the time of the phone's release. While the camera capabilities would be seen as limited by today’s standards, they provided reasonable performance for simple photography needs.
The device is powered by a Li-Ion 2000 mAh battery that offers decent battery life, allowing for several hours of talk time and stand-by duration typical for an entry-level device in its time. The battery is removable, providing users with the flexibility to replace the battery once its performance declines after extended use.
The Celkon A402 supports GSM and HSPA network technologies, facilitating 2G and 3G connectivity. The device operates on several frequencies : GSM 900/1800 for SIM 1 and SIM 2, and HSDPA 2100 for 3G connectivity. While it does not support 4G LTE, which is now the standard, the 3G capability ensures reasonable speeds of up to 384 kbps for web browsing and data usage.
The device incorporates Wi-Fi 802.11 b/g/n, Bluetooth 4.0 with A2DP, and positioning with GPS. The absence of NFC is a limitation, but the presence of FM radio and a microUSB 2.0 port provide additional functionality.
The Celkon A402 houses a loudspeaker and a standard 3.5mm headphone jack, offering audio output options suited for multimedia consumption. It also features an accelerometer sensor, which aids in device orientation detection and basic motion sensing, supporting gaming applications and screen orientation changes.
The Celkon A402 is a product of its time, providing basic features and capabilities tailored towards budget-conscious consumers. Despite its discontinuation, the device marks a step in the ongoing evolution of smartphones, illustrating how far technology has come in a relatively short timeframe. For those interested in mobile technology history or collecting vintage gadgets, the Celkon A402 stands as a testament to the advancements and aspirations of past smartphone design.
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