84% SPEC SCORE
$281
The Redmi K40S comes with Android 12, ensuring enhanced functionality and smooth multitasking. It features a big 6.67-inches Crystal-clear Full HD+ display, perfect for both work and entertainment. Experience smooth transitions and quick responsive performance for everyday use. With a Good 4500 mAh battery life, you can stay powered throughout the day without frequent charging. Price starting at $281 this device is budget-friendly and it’s offers incredible value, blending performance, style, and affordability.
Redmi K40S Key Features
Display
6.67 inches (1080x2400 pixels) FHD
120Hz Refresh rate
Camera
48+8+2 MP (Triple Camera)
20 MP Selfie 4K Video
Hardware
Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
OS
Android 12
MIUI 13
Ram & Storage
6GB + 128GB
8GB + 128GB
Battery
Li-Po 4500mAh
wired, PD3.0, 67W, QC3, 100% in 38 min (advertised)
Data Updated on: 20 Aug, 2026
Redmi K40S Pros & Cons
By Amit Dubey | on 21 August 2026
7
/ 10
TSI Score
Design
Display
Performance
Battery
Camera
Software
Sound
Usage
Redmi K40S Price and Full Specifications
Launch Date
| Announced Date | 17 Mar, 2022 |
| Released Date | 17 Mar, 2022 |
| Status | Available |
Network
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G |
| 2G bands | GSM 850 / 900 / 1800 / 1900 / CDMA 800 |
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 / CDMA2000 1x |
| 4G bands | LTE |
| 5G bands | 5G |
| Speed | HSPA / LTE / 5G |
Display
Similar Display
| Screen Size | 6.67 inches, 107.4 cm² (~86.6% screen-to-body ratio) |
| Display Type | AMOLED |
| Resolution | 1080 × 2400 pixels (FHD) |
| Aspect Ratio | 20:9 |
| PPI | 395 ppi |
| Refresh Rate | 120Hz |
| Brightness | 1300 nits (peak) |
| HDR Support | HDR10+ |
| Protection | Corning Gorilla Glass 5 |
Performance
Similar Performance
| Processor (SoC) | Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) |
| Fabrication process | 7nm |
| CPU | Octa-core: 1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585 |
| CPU cores | 8 |
| GPU | Adreno 650 |
Storage
| Memory | 6GB + 128GB, 8GB + 128GB, 8GB + 256GB, 12GB + 256GB |
| Storage type | UFS 3.1 |
| Memory Card Slot | No |
Camera
Similar Camera
REAR CAMERA | |
| Type | Triple camera |
| Primary | 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF, OIS |
| Secondary | 8 MP, 119Ëš (ultrawide) |
| Tertiary | 2 MP, f/2.4, (macro) |
| Features | Dual-LED dual-tone flash, HDR, panorama |
| Video Recording | 4K @30fpsfps 1080p @30/60/120fpsfps 720p @960fpsfps gyro-EIS |
FRONT CAMERA | |
| Type | Single camera |
| Primary | 20 MP, (wide) |
| Video Recording | 1080p @30/120fpsfps |
Battery
Similar Battery
| Battery Capacity | Li-Po 4500mAh |
| Battery Removable | No |
| Charging | 67W wired (PD3.0, QC3) — 100% in 38 min (advertised) |
Software & OS
| Operating System | Android 12 |
| OS UI | MIUI 13 |
Design
| Dimensions | 163.2 x 76 x 7.7 mm (2.99 x 0.3 in) |
| Weight | 195g (6.88 oz) |
| Color Options | Black, Gray, Blue, Green |
| Water & Dust Resistance | Splash resistant |
| Build | Glass front (Gorilla Glass 5), plastic back |
| Sim Card Types | Dual SIM (Nano-SIM, dual stand-by) |
Connectivity
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6, Wi-Fi Direct |
| Bluetooth | 5.2, A2DP, LE |
| Positioning | GPS, GLONASS, BDS, GALILEO, QZSS, NavIC |
| NFC | Yes |
| Radio | No |
| Infrared-port | No |
| USB Version | USB Type-C 2.0, OTG |
Sound
| Loudspeaker | Yes, with stereo speakers |
| Sound Jack | No 3.5mm jack |
Sensors & Features
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum |
Additional Info
| Pricing | $281.35 / R$ 1.460.43 / ₹23,491 / £223.37 / €260 / C$388.99 |
What's in the Box
| Redmi K40S | Handset, USB-C cable, SIM ejector tool, and quick start guide |
Disclaimer: Information here may not be 100% accurate; please verify specs and prices on the retailer's website before buying. This page contains affiliate links. We may earn a commission if you make a purchase through them, at no extra cost to you. Thanks for your support!
Redmi K40S Comparisons
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