Xiaomi Redmi K40 Series

Graphics Adapter: ARM Mali-G77 MP9, Qualcomm Adreno 650, Qualcomm Adreno 660
Display: 6.44 inch, 6.67 inch
Weight: 0.173kg, 0.195kg, 0.196kg
Price: 280, 400, 460, 480 euro
Average of 5 scores (from 22 reviews)
Xiaomi Redmi K40
Specifications

Processor: Qualcomm Snapdragon SD 870
Graphics Adapter: Qualcomm Adreno 650
Display: 6.67 inch, 20:9, 2400 x 1080 pixels
Weight: 0.196kg
Price: 460 euro
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Reviews
Source: DxOMark

Those looking for an adept tool for recording in a variety of situations would be wise to look elsewhere. In playback, the Xiaomi Redmi K40 Gaming will please gamers looking for loud volume, decent spatial attributes, and good performance on dynamics sub-attributes like attack and punch.
Single Review, online available, Long, Date: 09/22/2021
Source: Igeekphone

Therefore, for the K40 series of the “full series of rising cups”, I think it can be regarded as an attempt by Redmi to develop upwards. Perhaps in the future, we can see that Redmi will have more “lifting cups” products and continue to consolidate and improve itself in the industry’s market and position. There is no doubt that the K40 series can and must make a good start for Redmi’s new 10-year road.
Single Review, online available, Very Long, Date: 03/03/2021
Xiaomi Redmi K40 Pro
Specifications

Processor: Qualcomm Snapdragon SD 888 5G
Graphics Adapter: Qualcomm Adreno 660
Display: 6.67 inch, 20:9, 2400 x 1080 pixels
Weight: 0.196kg
Price: 480 euro
Links:
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Average Score:
Reviews
Hardly any other smartphone currently offers such good technical features as the Redmi K40 Pro: 120 Hz AMOLED panel with 1,300 nits, Snapdragon 888, UFS 3.1 storage and WiFi 6E for well under 500 Euros (~$609). However, the Xiaomi phone has a big catch...
Source: Cashify

Xiaomi Redmi K40 Pro is an impeccable flagship smartphone with excellent battery life, a great OLED panel, powerful chipset, a stereo speaker setup, and that too at a price tag that no Samsung or Apple flagship could reach i.e. half of what you would pay on these two brands to buy a flagship phone. The phone does have some issues though such as overheating when playing games and extensive tasks.
Single Review, online available, Medium, Date: 08/22/2021
Source: Cashify

Xiaomi Redmi K40 Pro is an impeccable flagship smartphone with excellent battery life, a great OLED panel, powerful chipset, a stereo speaker setup, and that too at a price tag that no Samsung or Apple flagship could reach i.e. half of what you would pay on these two brands to buy a flagship phone. The phone does have some issues though such as overheating when playing games and extensive tasks.
Single Review, online available, Medium, Date: 08/22/2021
Source: TechTablets

Redmi K40 Pro review. It's like the POCO F3, but it has the IMX682 and the faster SD888. This detailed review covers all you need to know if you're considering it.
Single Review, online available, Very Long, Date: 03/26/2021
Source: TechTablets

Redmi K40 Pro review. It's like the POCO F3, but it has the IMX682 and the faster SD888. This detailed review covers all you need to know if you're considering it.
Single Review, online available, Very Long, Date: 03/26/2021
Foreign Reviews
Source: Go2 Mobile

Single Review, online available, Long, Date: 04/11/2021
Rating: Total score: 82% price: 96% performance: 91% mobility: 85% workmanship: 83%
Source: Go2 Mobile

Single Review, online available, Long, Date: 04/11/2021
Rating: Total score: 82% price: 96% performance: 91% mobility: 85% workmanship: 83%
Source: Chinahandys.net

Single Review, online available, Long, Date: 03/31/2021
Rating: Total score: 90% performance: 100% display: 100% mobility: 90% workmanship: 90%
Source: Chinahandys.net

Single Review, online available, Long, Date: 03/31/2021
Rating: Total score: 90% performance: 100% display: 100% mobility: 90% workmanship: 90%
Source: Genk

Positive: Good price; decent processor; quick charging.
Single Review, online available, Long, Date: 03/10/2021
Source: Genk

Positive: Good price; decent processor; quick charging.
Single Review, online available, Long, Date: 03/10/2021
Xiaomi Redmi K40 Gaming
Specifications

Processor: Mediatek Dimensity 1200
Graphics Adapter: ARM Mali-G77 MP9
Display: 6.44 inch, 20:9, 2400 x 1080 pixels
Weight: 0.173kg
Price: 400 euro
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Reviews
Source: Igeekphone

The Redmi K40 game enhanced version is also the first real gaming phone on the MediaTek platform. Equipped with the Dimensity 1200 can also be regarded as an e-sports dream for “Fage”. In terms of paper parameters, Dimensity 1200 is significantly improved compared to Dimensity 1000+. In our previous tests of other models, we found that its silent frequency can be comparable to Snapdragon 865+. If the liberation overclocking is further optimized, the future room for improvement is not small, and it is found through actual measurement that it is completely sufficient to deal with the current mainstream mobile games with full frame rates.
Single Review, online available, Very Long, Date: 04/28/2021
Foreign Reviews
Source: Genk

Positive: Powerful processor; high gaming performance; good price. Negative: Unsupported Google services.
Single Review, online available, Long, Date: 05/18/2021
Source: Genk

Positive: Powerful hardware; high gaming performance; premium design. Negative: Unsupported Google services.
Single Review, online available, Medium, Date: 05/08/2021
Source: Nghenhin Vietnam

Positive: Good price; large battery capacity; powerful hardware; high gaming performance; excellent display.
Hands-On, online available, Long, Date: 05/04/2021
Source: Nghenhin Vietnam

Positive: Powerful processor; nice display; quick charging; attractive price.
Single Review, online available, Short, Date: 04/28/2021
Xiaomi Redmi K40 Pro+
Specifications

Processor: Qualcomm Snapdragon SD 888 5G
Graphics Adapter: Qualcomm Adreno 660
Display: 6.67 inch, 20:9, 2400 x 1080 pixels
Weight: 0.196kg
Price: 480 euro
Links:
Pricecompare
Reviews
Source: DxOMark

Launched exclusively for the Chinese market, the K40 Pro+ is Xiaomi’s latest device in their Redmi line of more affordable smartphones. Features include the Snapdragon 888 chipset with 12GB RAM and 256GB internal storage; as well as a 6.67-inch, FHD+ resolution, 120 Hz display, and a 4520 mAh battery with fast 33 W charging.
Single Review, online available, Long, Date: 06/30/2021
Source: DxOMark

Overall, the Xiaomi Redmi K40 Pro + performed decently in playback and was notably able as a recording device, especially at this price point. In playback, it had a good volume performance at both ends of the spectrum, good wideness in landscape mode, and correct bass precision despite the lack of bass and low-end, which was one thing holding it back overall as a playback device. The lack of high-end extension was also an issue. The tonal balance was inconsistent. As a recording device, the K40 Pro + really shined. Other than compression that impaired dynamics in the high SPL scenario, the K40 Pro+ turned in an excellent score in timbre and above-average scores in other attributes.
Single Review, online available, Medium, Date: 06/30/2021
Xiaomi Redmi K40S
Specifications

Processor: Qualcomm Snapdragon SD 870
Graphics Adapter: Qualcomm Adreno 650
Display: 6.67 inch, 16:9, 2400 x 1080 pixels
Weight: 0.195kg
Price: 280 euro
Links:
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Reviews
Source: OI Spice Tech News

So, for the final conclusion, it would be correct to describe the Xiaomi Redmi K40S smartphone as a budget-friendly 5G smartphone equipped with striking features. A 5G phone with a straightforward layout, premium display, powerful chipset, and speedy charging, all under the Rupees 25K range. Well, the users may have to compromise a bit in the camera section otherwise everything is perfectly fine. Consumers who are satisfied with its specs must get their hands on the Redmi K40S, whenever it is available globally. Although the model is now available only in China, the customers from other countries may consider & choose from immense options prevailing in the market under this segment. If you are looking for something similar but powerful phone, you should check out the Redmi K40 Gaming or the Redmi K50 Pro meanwhile.
Single Review, online available, Medium, Date: 04/26/2022
Source: OI Spice Tech News

The Xiaomi Redmi K40S smartphone is announced in March 2022, and the phone arrived with a price tag of $280 (Rs 21,590 in India) approx. It brings the standard 6.67 inches AMOLED panel that renders an impressive 120Hz refresh rate, 1300 nits brightness, and splash-resistant features. The Redmi K40S smartphone is available in 6GB/8GB/12GB RAM with 128GB/256GB internal storage variants. The latest Android 12 OS is compatible with MIUI 13 UI. For gaming and multitasking, 7nm – Qualcomm Snapdragon 870 5G chipset and Adreno 650 GPU are present. The Xiaomi Redmi K40s smartphone comes with a triple camera setup which has a 48 MP main camera, 8 MP ultrawide, and 2MP macro lenses so that you can capture portraits, landscapes, and more. Features on the rear camera setup include Digital Zoom, Auto Flash, HDR, Face detection, and Touch to focus. With this setup, you can record up to 4K videos with no issues. On the front, the mobile features a 20 MP selfie camera so that you can click some amazing selfies and do video chats.
Single Review, online available, Short, Date: 03/31/2022
Source: Igeekphone

The Redmi K40S is also one of the few models with a high-quality AMOLED flagship straight screen. The 120Hz high refresh rate and 360Hz touch sampling rate that can enhance the gaming experience are not absent. It also supports Dolby Vision and HDR10+ high dynamic range display. Then Atmos dual speakers. In-game or film and television experience, this Redmi K40S can bring users excellent visual enjoyment. It can be said that Redmi K40S has no shortcomings in terms of screen, performance, photography, fast charging, and other aspects. After the upgrade, it is even cheaper, starting at only 1799 yuan. It is no wonder that it is out of stock as soon as it goes on sale. Such a god-level price/performance ratio, what are you waiting for?
Single Review, online available, Very Long, Date: 03/29/2022
Comment
Xiaomi:
Founded in 2010, Xiaomi Corporation is a Chinese multinational electronics company and produces consumer electronics and related products, including smartphones, televisions, fitness bands, power banks, headphones, smart devices and accessories. Xiaomi offers its products under the Mi, Redmi and POCO brands.
Modern games should be playable with these graphics cards at low settings and resolutions. Casual gamers may be happy with these cards.
Qualcomm Adreno 650: Graphics chip for smartphones and tablets that is integrated within the Qualcomm Snapdragon 865 SoC. Qualcomm claims that it is 25% faster than the Adreno 640 in the Snapdragon 855 SoC and offers 50% more compute units (ALUs). For Android it should be one of the fastest graphics cards in 2020.
Qualcomm Adreno 660: Graphics chip for smartphones and tablets that is integrated within the Qualcomm Snapdragon 888 SoC. Qualcomm claims that it is 35% faster than the Adreno 650 in the Snapdragon 865 SoC and offers a 20% better power efficiency.For Android it should be one of the fastest graphics cards in 2021.
Non demanding games should be playable with these graphics cards.
ARM Mali-G77 MP9: Integrated graphics card based on the Valhall architecture. Uses 9 of the 16 possible clusters and according to ARM offers 30% better performance at 30% better efficiency compared to a Mali-G76.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
Qualcomm Snapdragon:
SD 870: High-end SoC for smartphones that was introduced in mid 2020 and manufactured in 7 nm at TSMC (improved N7P). Integrates one Prime Core based on a ARM Cortex-A77 architecture clocked at up to 3.2 GHz. Three more performance cores are also based on the A77 but clock up to 2.42 GHz. Furthermore, four energy saving cores are integrated that are based on the ARM Cortex-A55 architecture and clock at up to 1.8 GHz.
SD 888 5G: High-end SoC for smartphones that was introduced in late 2020 and manufactured in 5 nm at Samsung. Integrates one “Prime Core” based on a ARM Cortex-X1 architecture clocked at up to 2.84 GHz. Three more performance cores are based on the A78 but clock up to 2.42 GHz. Furthermore, four energy saving cores are integrated that are based on the ARM Cortex-A55 architecture and clock at up to 1.8 GHz. In addition to the processor cores, the SoC integrates a WiFi 6e modem, a Hexagon 780 DSP (up to 26 TOPS of AI performance) and a Spectra 580 ISP. The integrated memory controller now supports faster LPDDR5 memory with up to 3,200 MHz. 5G is now included in the chip with the Snapdragon X60 modem.
Mediatek :
Dimensity 1200: The Dimensity 1200 is a high-end SoC with an integrated 5G modem. It includes four fast ARM Cortex-A78 cores at up to 3 GHz and four power efficient Cortex-A55 cores at up to 2 GHz.
» Further information can be found in our Comparison of Mobile Processsors.
» To find out how fine a display is, see our DPI List.
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86.18%: This is an above-average rating. Nevertheless, it should not be forgotten that about one fifth of all tested models receive a better rating.
» Further information can be found in our Notebook Purchase Guide.