88% SPEC SCORE
$302
The Redmi K40 comes with Android 11, ensuring enhanced functionality and smooth multitasking. It features a large 6.67-inches sharp FHD+ display, perfect for both work and entertainment. Get smooth, responsive performance for effortless day-to-day usage. With a Decent 4520 mAh battery life, you can stay powered throughout the day without frequent charging. Price starting at $301 this device is Wallet-friendly and it’s offers incredible value, blending performance, style, and affordability.
Redmi K40 Key Features
Display
6.67 inches (1080x2400 pixels) FHD
120Hz Refresh rate
Camera
48+8+5 MP (Triple Camera)
20 MP Selfie 4K Video
Hardware
Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
OS
Android 11
MIUI 12
Ram & Storage
6GB + 128GB
8GB + 128GB
Battery
Li-Po 4520mAh
wired, PD3.0, 33W, QC3, 100% in 52 min (advertised)
Data Updated on: 01 Oct, 2026
Redmi K40 Pros & Cons
By Amit Dubey | on 01 October, 2026
6.4
/ 10
TSI Score
Design
Display
Performance
Battery
Camera
Software
Sound
Usage
Pros
Snapdragon 870 at mid-range money.
120Hz display is a clear selling point.
Large 6.67-inch screen without stepping down to 720p.
4520mAh battery is sensibly sized for the hardware.
Cons
Only 6GB RAM in the listed configuration.
128GB storage may feel tight for heavy local media.
No camera hardware listed here to support a strong imaging claim.
Redmi K40 Price and Full Specifications
Launch Date
| Announced Date | 25 Feb, 2021 |
| Released Date | 04 Mar, 2021 |
| 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 | 1, 3, 28, 41, 77, 78, SA/NSA/Sub6 |
| Speed | HSPA / LTE / 5G |
Display
| Screen Size | 6.67 inches, 107.4 cm² (~85.9% screen-to-body ratio) |
| Display Type | Super 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
| 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 |
Benchmarking
System Performance
Redmi K40
Overall Score
...
AnTuTu
Geekbench 6 Single-Core
Storage
| Memory | 6GB + 128GB, 8GB + 128GB, 8GB + 256GB, 12GB + 256GB |
| Storage type | UFS 3.1 |
| Memory Card Slot | No |
Camera
REAR CAMERA | |
| Type | Triple camera |
| Primary | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF |
| Secondary | 8 MP, f/2.2, 119˚ (ultrawide) |
| Tertiary | 5 MP, 50mm (macro), 1/5.0", 1.12µm |
| Features | LED flash, HDR, panorama |
| Video Recording | 4K @30fps 1080p @30/60/120/240/960fps gyro-EIS |
FRONT CAMERA | |
| Type | Single camera |
| Primary | 20 MP, f/2.5, (wide), 0.8µm |
| Features | HDR |
| Video Recording | 1080p @30fps 720p @120fps |
Battery
| Battery Capacity | Li-Po 4520mAh |
| Battery Removable | No |
| Charging | 33W wired (PD3.0, QC3) — 100% in 52 min (advertised) |
Software & OS
| Operating System | Android 11 |
| OS UI | MIUI 12 |
Design
| Dimensions | 163.7 x 76.4 x 7.8 mm (3.01 x 0.31 in) |
| Weight | 196g (6.91 oz) |
| Color Options | Black, White, Aurora |
| 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 | 5.1, A2DP, LE |
| Positioning | GPS, GLONASS, BDS, GALILEO, QZSS, NavIC |
| NFC | Yes |
| Radio | No |
| Infrared-port | Yes |
| 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
| Models | M2012K11AC |
| Pricing | $301.7 / R$ 1.575.63 / ₹25,187 / £240.97 / €280 / C$429.83 |
What's in the Box
| Redmi K40 | 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 K40 Comparisons
Redmi K40
$302
88% SPEC SCORE
6.67 inches (16.94 cm)
120Hz Display
48+8+5 MP (Triple)
20 MP (Single)
Qualcomm
SM8250-AC Snapdragon 870 5G (7 nm)
Android 11
MIUI 12
4520 mAh
33W wired QC3
6 GB RAM
128 GB Storage
Redmi K100 Pro
$734
94% SPEC SCORE
6.9 inches (17.53 cm)
185Hz Display
200+50+50 MP (Triple)
32 MP (Single)
Qualcomm
SM8850-AC Snapdragon 8 Elite Gen 5
Android 16
HyperOS 3
9000 mAh
100W wired
12 GB RAM
256 GB Storage
OnePlus 16
$671
93% SPEC SCORE
6.9 inches (17.53 cm)
120Hz Display
64+50+50 MP (Triple)
32 MP (Single)
Qualcomm
Snapdragon 8 Elite Gen 5
Android 16
OxygenOS 16
7300 mAh
120W wired
12 GB RAM
256 GB Storage
Realme 16 Pro Plus 5G
$443
92% SPEC SCORE
6.8 inches (17.27 cm)
120Hz Display
200+50+8 MP (Triple)
50 MP (Single)
Qualcomm
SM7750-AB Snapdragon 7 Gen 4
Android 16
N/A
7000 mAh
80W wired
8 GB RAM
128 GB Storage
OnePlus Ace 4 Pro
$515
90% SPEC SCORE
6.78 inches (17.22 cm)
120Hz Display
64+13+8 MP (Triple)
32 MP (Single)
Qualcomm
SM8475 Snapdragon 8 Gen 3
Android 14
N/A
4700 mAh
180W wired
16 GB RAM
512 GB Storage
vivo V31 Pro 5G
$515
84% SPEC SCORE
6.8 inches (17.27 cm)
120Hz Display
64+50+50 MP (Triple)
50 MP (Single)
MediaTek
Dimensity 9300
Android 14
FuntouchOS 14
5000 mAh
100W Fast Charging
12 GB RAM
256 GB Storage
vivo V50 Pro 5G
$656
82% SPEC SCORE
6.8 inches (17.27 cm)
144Hz Display
50+50+50+50 MP (Quad)
50 MP (Single)
MediaTek
Dimensity 9300
Android 15
Funtouch OS 15
5700 mAh
100W Fast Charging
8 GB RAM
256 GB Storage
vivo V60 Pro
$616
88% SPEC SCORE
6.78 inches (17.22 cm)
120Hz Display
50+50+50 MP (Triple)
50 MP (Single)
MediaTek
Dimensity 7200
Android 15
Funtouch OS
6000 mAh
100W Wired Flash Charger
8 GB RAM
256 GB Storage
OnePlus 14R
$574
90% SPEC SCORE
6.8 inches (17.27 cm)
120Hz Display
50+50+50 MP (Triple)
32 MP (Single)
Qualcomm
Snapdragon 8 Gen 3
Android 16
Oxygen OS
6700 mAh
80W Fast Charging (SUPERVOOC Charging)
12 GB RAM
256 GB Storage
Nokia N73 5G
$557
86% SPEC SCORE
6.9 inches (17.53 cm)
120Hz Display
200+12+8+2+2 MP (Quad)
32 MP (Single)
Qualcomm
Snapdragon 8 Gen1
Android 12
N/A
6000 mAh
65W Fast Charging
12 GB RAM
256 GB Storage
Xiaomi 14 SE
$479
87% SPEC SCORE
6.55 inches (16.64 cm)
120Hz Display
50+50+12 MP (Triple)
32+32 MP (Dual)
Qualcomm
Snapdragon 8s Gen3
Android 14
HyperOS
4700 mAh
67W Fast Charging
12 GB RAM
256 GB Storage
Motorola Moto S40 Pro
$478
86% SPEC SCORE
6.67 inches (16.94 cm)
144Hz Display
108+13+5 MP (Triple)
32 MP (Single)
Qualcomm
SM8475 Snapdragon 8+ Gen 1 (4 nm)
Android 13
N/A
4500 mAh
22.5W wired
8 GB RAM
128 GB Storage
Samsung Galaxy S25 Slim
$592
80% SPEC SCORE
6.3 inches (16.00 cm)
120Hz Display
50+12+12 MP (Triple)
12 MP (Single)
Qualcomm
Exynos
Android 14
OneUI 6.0
4500 mAh
25W Fast Charging
8 GB RAM
256 GB Storage
Samsung Galaxy A74 5G
$515
87% SPEC SCORE
6.7 inches (17.02 cm)
120Hz Display
108+12+5+5 MP (Quad)
32 MP (Single)
Qualcomm
Snapdragon 7 Gen1
Android 12
N/A
5000 mAh
33W Fast Charging
8 GB RAM
128 GB Storage
Samsung Galaxy A75 5G
$536
83% SPEC SCORE
6.7 inches (17.02 cm)
120Hz Display
108+12+5+5 MP (Quad)
32 MP (Single)
Qualcomm
Snapdragon 778G+
Android 12
N/A
5000 mAh
67W Fast Charging
8 GB RAM
128 GB Storage
vivo V33 Pro
$520
83% SPEC SCORE
N/A
144Hz Display
50+50+50+50 MP (Quad)
50 MP (Single)
Qualcomm
Snapdragon 8 Gen3
Android 15
Funtouch OS 15
5000 mAh
100W Fast Charging (Flash Charge)
12 GB RAM
256 GB Storage
OnePlus Ace 6 Ultra
$458
93% SPEC SCORE
6.78 inches (17.22 cm)
144Hz Display
50+50 MP (Dual)
32 MP (Single)
N/A
N/A
Android 16
ColorOS
7000 mAh
100W Fast Charging
12 GB RAM
256 GB Storage
Samsung Galaxy Quantum 5
$561
79% SPEC SCORE
6.6 inches (16.76 cm)
120Hz Display
64+12+5 MP (Triple)
32 MP (Single)
Qualcomm
Snapdragon 8 Gen4
Android 14
One UI 6.1
5000 mAh
N/A
6 GB RAM
128 GB Storage
HMD Tomcat
$433
84% SPEC SCORE
6.8 inches (17.27 cm)
120Hz Display
108+2+8 MP (Triple)
32 MP (Single)
Qualcomm
Snapdragon 7s Gen 2 SoC
Android 14
N/A
4900 mAh
33W charging
8 GB RAM
128 GB Storage
Energizer Ultimate U660S
$536
75% SPEC SCORE
6.67 inches (16.94 cm)
144Hz Display
64+8 MP (Dual)
25 MP (Single)
MediaTek
Helio G99
Android 14
N/A
3400 mAh
33W Fast Charging
6 GB RAM
128 GB Storage
Motorola Razr 50s
$550
77% SPEC SCORE
6.9 inches (17.53 cm)
120Hz Display
50+13 MP (Dual)
16 MP (Single)
Qualcomm
Snapdragon 8s Gen 3
Android 14
My UX
4000 mAh
30W Fast Charging
8 GB RAM
128 GB Storage
HMD Skyline G2
$515
78% SPEC SCORE
6.67 inches (16.94 cm)
120Hz Display
108+12+8 MP (Triple)
32 MP (Single)
Qualcomm
Snapdragon 7s Gen2
Android 14
N/A
4900 mAh
33W Fast Charging
4 GB RAM
128 GB Storage
Nokia 7610 5G
$630
81% SPEC SCORE
6.9 inches (17.53 cm)
120Hz Display
108+13+12 MP (Triple)
8 MP (Single)
Unisoc
T606
Android 13
N/A
4500 mAh
80W Fast Charging
12 GB RAM
256 GB Storage
Samsung Galaxy A92 5G
$572
76% SPEC SCORE
6.7 inches (17.02 cm)
N/A
48+12+5 MP (Triple)
16 MP (Single)
MediaTek
Dimensity 1300
Android 12
N/A
5000 mAh
Fast Charging
8 GB RAM
128 GB Storage
Apple iPhone SE 4
$596
79% SPEC SCORE
6.06 inches (15.39 cm)
60Hz Display
48 MP (Single)
10.8 MP (Single)
Apple
A16
iOS 18
N/A
3279 mAh
18W Fast Charging
8 GB RAM
64 GB Storage
Apple iPhone 9 Plus
$549
77% SPEC SCORE
5.5 inches (13.97 cm)
N/A
12 MP (Single)
7 MP (Single)
Apple
A13
iOS
N/A
2750 mAh
N/A
4 GB RAM
64 GB Storage
Reviews (0)
No reviews yet. Be the first to review!
Frequently Asked Questions
Is the Redmi K40 good for gaming?
The Redmi K40 is well suited for mobile gaming thanks to its Qualcomm Snapdragon 870 5G processor and 120Hz display. The 6.67-inch FHD+ screen gives games a large viewing area, while the high refresh rate can make supported titles feel smoother. Its 4520mAh battery also provides a solid capacity for longer gaming sessions, though real battery life will vary by game, brightness, and network use.
Does the Redmi K40 have a 120Hz display?
The Redmi K40 has a 6.67-inch display with a 120Hz refresh rate and a 1080x2400 resolution. A 120Hz screen can make scrolling, animations, and supported games look smoother than standard 60Hz panels. Search context also highlights the Redmi K40’s 120Hz FHD+ OLED display as one of the main areas covered in reviews.
How long does the Redmi K40 battery last?
The Redmi K40 includes a 4520mAh battery, which is a competitive capacity for a phone with a large 6.67-inch 120Hz display. Battery life will depend heavily on screen refresh rate, gaming, camera use, and 5G or mobile data activity. For buyers, the combination of a Snapdragon 870 5G chipset and 4520mAh battery makes it a practical option for daily use, streaming, and moderate gaming.
Is the Redmi K40 worth buying at its price?
The Redmi K40 offers strong value if you want a Snapdragon 870 5G phone with a 120Hz FHD+ display at around USD 301.7. Its listed 6GB RAM and 128GB storage configuration covers common needs like apps, media, browsing, and multitasking. Buyers comparing mid-range performance phones may find the Redmi K40 attractive because it combines a high-refresh display, capable Qualcomm chipset, and 4520mAh battery at a relatively accessible price.
Our Latest Blog
Check the full list of Xiaomi, Redmi, and POCO devices eligible for the HyperOS 4 Android 17 update, expected release timeline, and supported models.
Tech Specs
07 Mar, 2026
Xiaomi 17 Series is launching in Europe on February 28, featuring the standard Xiaomi 17 and 17 Ultra, but without the Pro models’ rear-display feature. Check prices, colors, and specs.
Tech Specs
25 Feb, 2026
Xiaomi is all set to refresh its Redmi Note series with the Note 15 this January. Get better display, camera, and performance with this latest iteration. Find all the latest information available befo...
Tech Specs
14 Jan, 2026
Took the Xiaomi 15T for a week-long test - from gaming to camera to battery life. Here’s a brutally honest review of how it really performs.
Tech Specs
15 Oct, 2025
Xiaomi 15T Pro Hands-On Review - from gaming to camera tests. Here’s an honest, no-fluff review of how it actually performs in daily use.
Tech Specs
15 Oct, 2025