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Redmi K40S
Redmi’s March 2022 update of the K40 keeps the Snapdragon 870 and the 6.67-inch 120Hz E4 AMOLED display, and adds OIS to the 48MP main camera, 67W charging for the 4500mAh battery and a larger vapour chamber. It launched in China on 17 March 2022 from 1,799 yuan (6GB/128GB) and is more than four years old. The related POCO F4 has a 64MP main camera.
Pros
- Snapdragon 870 with LPDDR5 RAM and UFS 3.1 storage, cooled by a vapour chamber of up to 3,112 mm²
- 6.67-inch 120Hz Samsung E4 AMOLED rated at 1,300 nits peak brightness, with HDR10+ support
- 48MP Sony main camera with optical image stabilization and 4K video at 30fps
- 67W wired charging with the charger in the box; Redmi quotes about 38 minutes for a full charge
- Stereo speakers with Dolby Atmos
Cons
- Launched in China only, with no official US price
- Secondary cameras are basic: an 8MP ultra-wide and a 2MP macro, with no telephoto
- No 3.5mm headphone jack (audio goes through USB-C) and no microSD slot
- No wireless charging and a USB-C port limited to USB 2.0 speeds
Average
Computed from specs & benchmarks via our public methodology.
Full specifications
Everything we track for the Redmi K40S
Display
- Screen size
- 6.67 ″
- Panel type
- AMOLED
- Resolution
- 1080x2400
- Pixel density
- 395 ppi
- Refresh rate
- 120 Hz
- Peak brightness
- 1,300 nits
- Screen-to-body
- 86.6 %
Performance
- Chipset
- Snapdragon 870
- AnTuTu 11
- 975,227Bottom 23%
- AnTuTu 11 (CPU)
- 379,746Bottom 30%
- AnTuTu 11 (GPU)
- 167,900Bottom 24%
- AnTuTu 11 (Memory)
- 178,472Bottom 29%
- AnTuTu 11 (UX)
- 249,109Bottom 15%
- RAM (max)
- 12 GB
- Storage options
- 128/256GB
- Storage type
- UFS 3.1
Camera
- Main camera
- 48 MP
- Main aperture
- f/1.79
- Ultra-wide
- 8 MP
- Max video
- 4K@30fps
- Front camera
- 20 MP
- OIS
- Yes
Battery
- Capacity
- 4,500 mAh
- Wired charging
- 67 W
Design
- Weight
- 195 g
- Thickness
- 7.7 mm
Connectivity
- 5G
- Yes
- Wi-Fi
- Wi-Fi 6
- Bluetooth
- 5.2
- NFC
- Yes
- USB
- USB-C 2.0
- eSIM
- No
Software
- OS at launch
- Android 12 (MIUI 13)
Audio
- Stereo speakers
- Yes
- 3.5mm jack
- No
Quick answers
Is the Redmi K40S good in 2026?
The Redmi K40S earns an Inno Score of 53.8/100 (“Average”) based on its specs and benchmark results. Redmi’s March 2022 update of the K40 keeps the Snapdragon 870 and the 6.67-inch 120Hz E4 AMOLED display, and adds OIS to the 48MP main camera, 67W charging for the 4500mAh battery and a larger vapour chamber. It launched in China on 17 March 2022 from 1,799 yuan (6GB/128GB) and is more than four years old. The related POCO F4 has a 64MP main camera.
What is the Redmi K40S AnTuTu score?
The Redmi K40S scores 975,227 points in AnTuTu 11 (CPU 379,746, GPU 167,900, Memory 178,472, UX 249,109).
What are the key specs of the Redmi K40S?
Chipset: Snapdragon 870 · Screen size: 6.67 ″ · Capacity: 4,500 mAh · Main camera: 48 MP
What are the closest alternatives to the Redmi K40S?
Its closest rivals on InnoReviews are OPPO Reno13, realme Narzo 80 Pro 5G, realme P4 Power 5G — open the comparison pages for a spec-by-spec breakdown.
