Introductions

Redmi K40S is a beautiful device that was officially announced in March 2022. It adopts a modern design and includes multiple great features that can be used by all users.

The Redmi K40S is also known as the device model series Unknown, which must be unique so that users can easily find support online. Sometimes using only the main device name can make it difficult for several users to find the right support. The weight of Redmi K40S is 195 g grams and the body dimensions are 163.2 x 76 x 7.7 mm. These dimensions are ideal for modern devices. Lastly, the device is available in Black, Gray, Blue, Green color options. However, the availability of color options may vary by country and market. Some color options may only be available for a limited time or during specific events.

Build Quality

The Redmi K40S features a body made of plastic, which is a common material used in entry to mid-level devices. While plastic is not a bad material in this modern era, it can feel cheap, be easily scratched, and lacks the solid feel of other materials. For flagship devices in higher price ranges, plastic bodies are generally not used, so if you find this material on the latest flagship device, it can be seen as a disadvantage for users.

Screen & User Navigation

The display screen configuration is a crucial factor for the user experience, and in the case of the Redmi K40S, the screen setup is ideal, featuring a resolution of 1080 x 2400 pixels combined with a screen size of 6.67". Additionally, the display screen also has several other configurations, including 20:9 ratio, (~395 ppi density), 120Hz, HDR10+, Corning Gorilla Glass 5.

Another important factor to consider for the display screen is the display panel hardware. Good display panel hardware will greatly enhance the user's experience. The Redmi K40S uses the AMOLED display hardware panel, which is one of the best screen panels available today. This type of display panel brings a better experience to the user, providing a brighter screen, clear view even in very sunny outdoor conditions, producing more realistic colors, and more detailed images.

The physical buttons on the Redmi K40S are positioned and designed for easy use, with clear functions such as powering up the device or adjusting the volume level.

CPU & GPU Performance

The processor and graphics hardware are vital components for any device, as they handle the majority of the software tasks and rendering graphics. In the case of the Redmi K40S, it utilizes the Qualcomm Snapdragon 870 for the CPU and Adreno 650 for the GPU. But, the question is: are they good enough?

The answer is yes. This CPU and GPU combination is capable of handling multiple tasks on the device, including running games, opening apps, and rendering 3D images at their maximal limit. Users can expect good performance from these hardware components.

Memory

In addition to CPU and GPU hardware, memory hardware is also a very important sector for ensuring the best user experience when using a device for multiple purposes. The memory sector includes the RAM capacity, internal memory storage, and support for external expansion memory. So, is Redmi K40S good enough in terms of memory performance?

When we look at the memory combination specification, we can see that Redmi K40S has 6GB / 8GB / 12GB of RAM and 128GB / 256GB of internal memory storage capacity. there is no support for external memory expansion, but that is fine because the capacity amount of the internal memory storage is good enough for the user, although without the external memory expansion feature support.

Therefore, does Redmi K40S have good memory performance? Based on the specifications, it is good enough for any modern use, but it also depends on the user's perspective and needs.

Camera

Just like other modern smart devices available today, Redmi K40S has a camera feature that enhances the user's experience. The main/rear camera feature of Redmi K40S has a Triple Setup camera configuration feature.

The main/rear camera specification of Redmi K40S is (Main) 48 MP, f/1.8, 1/2", 0.8µm, PDAF, OIS for the main camera configuration setup. There is also a secondary camera feature available with a specification of (Ultrawide) 8 MP, 119˚. The Redmi K40S also has a third camera feature with a specification detail of (Macro) 2 MP, f/2.4.

Redmi K40S has a Single Setup front/selfie camera feature. The main selfie camera specification on Redmi K40S is 20 MP.

Mobile Network

Redmi K40S fully supports mobile network broadband. It is equipped with a Dual SIM, Nano SIM Card feature. The device supports mobile network technology using 2G / 3G / 4G / 5G / CDMA / EVDO. Users can easily switch between mobile network modes when needed.

Connectivity features

When it comes to modern devices, having multiple connectivity options is essential, and the Redmi K40S has all the necessary features.

Wireless connectivity options on the Redmi K40S include Wi-Fi technology with a complete specification of Wi-Fi 802.11 a/b/g/n/ac, Dual Band/6 and Bluetooth version 5.2, A2DP, LE. In addition, the Redmi K40S also fully supports NFC technology.

Wired connectivity options include the USB Type-C Port technology, which can be very useful for connecting the Redmi K40S to other devices such as desktop computers.

OS & Security

As a device designed for modern users, Redmi K40S should be operated by a smart operating system. The good news is that Redmi K40S already uses a smart OS known as Android 12. In addition, the vendor of this device has made some customizations to the basic Android 12 firmware, resulting in the MIUI 13 ROM. This ROM adds more features and improves the user experience beyond what can be found on the basic OS.

What about security technology on Redmi K40S? The Redmi K40S has powerful security protection because it uses the default security system from the software OS combined with the Fingerprint (at the side) security hardware technology, which provides more security against unauthorized access.

Speaker & Sound

The speaker hardware on Redmi K40S is similar to most other devices, with a good loudspeaker quality for calling and playing music. However, Redmi K40S fully supports the Stereo Speaker technology, which is a great feature to have.

Battery

Redmi K40S comes with a 4500 mAh battery capacity and Li-Po battery model. This battery specification can be used for all-day use in normal terms. But don't worry if the device is on low battery state because Redmi K40S already supports Fast charging 67W technology. This means the charging time will be shorter, depending on the wattage of the fast charging feature. Normally, the battery can be fully charged in under 2 hours, 1 hour, or 40 minutes.

This device also comes with USB Type-C port technology. It's great because the USB Type-C is a universal charger port that can easily suit most charger cables on modern phones today.

Common frequently asked questions