🔑 Key Specs — Xiaomi Redmi K40
- OS: Android 11, MIUI 12
- Chipset: Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
- Display: 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
- Display Type: Li-Po 4520 mAh
- Storage: 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
- Main Camera: 20 MP, f/2.5, (wide), 1/3.4″, 0.8µm
- Battery: Li-Po 4520 mAh / 33W wired, PD3.0, QC3, 100% in 52 min
- Weight: 196 g (6.91 oz)
- NFC: Yes
- Colors: Black, White, Aurora
- Price: About 280 EUR
✅ Pros
- Li-Po 4520 mAh battery
- NFC support included
- Dedicated microSD card slot
- Up to 256GB storage option
❌ Cons
- No 5G support
Xiaomi Redmi K40 – Full Specifications and Complete Review
📅 Released 2021, March 04
⚡ Quick Overview
💻 Operating System
Android 11, MIUI 12
📏 Dimensions & Weight
196g, 7.8mm thickness
💾 Memory & Storage
128GB/256GB storage, no card slot
🔗 Services Xiaomi Redmi K40
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🔧
Problem Solutions
Hardware Fix
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📥
Download Firmware
Rom & Flash
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🔓
Network Unlock
Unlock & FRP
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⚙️
Root Files
Root Files
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📑 Review Contents
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 | 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42 |
| 5G bands | 1, 3, 28, 41, 77, 78 SA/NSA/Sub6 |
| Speed | HSPA, LTE, 5G |
Launch
| Announced | 2021, February 25 |
| Status | Available. Released 2021, March 04 |
Body
| Dimensions | 163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in) |
| Weight | 196 g (6.91 oz) |
| SIM | Nano-SIM + Nano-SIM |
Display
| Type | Super AMOLED, 120Hz, HDR10+, 1300 nits (peak) |
| Size | 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio) |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~395 ppi density) |
| Protection | Corning Gorilla Glass 5 |
Platform
| OS | Android 11, MIUI 12 |
| Chipset | Qualcomm SM8250-AC Snapdragon 870 5G (7 nm) |
| CPU | Octa-core (1×3.2 GHz Kryo 585 & 3×2.42 GHz Kryo 585 & 4×1.80 GHz Kryo 585) |
| GPU | Adreno 650 |
Memory
| Card slot | No |
| Internal | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM |
| Other | UFS 3.1 |
Main Camera
| Triple | 48 MP, f/1.8, 26mm (wide), 1/2.0″, 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide) 5 MP, f/2.4, 50mm (macro) |
| Features | Color spectrum sensor, LED flash, HDR, panorama |
| Video | 4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS |
Selfie camera
| Single | 20 MP, f/2.5, (wide), 1/3.4″, 0.8µm |
| Features | HDR |
| Video | 1080p@30fps, 720p@120fps |
Sound
| Loudspeaker | Yes, with stereo speakers |
| 3.5mm jack | No |
| Other | 24-bit/192kHz Hi-Res audio |
Comms
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct |
| Bluetooth | 5.1, A2DP, LE |
| Positioning | GPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC |
| NFC | Yes |
| Infrared port | Yes |
| Radio | No |
| USB | USB Type-C 2.0, OTG |
Features
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass |
Battery
| Type | Li-Po 4520 mAh |
| Charging | 33W wired, PD3.0, QC3, 100% in 52 min |
Misc
| Colors | Black, White, Aurora |
| Models | M2012K11AC |
| Price | About 280 EUR |
❓ Frequently Asked Questions — Xiaomi Redmi K40
Q1: What is the operating system of Xiaomi Redmi K40?
Android 11, MIUI 12
Q2: What is the battery capacity of Xiaomi Redmi K40?
Li-Po 4520 mAh with 33W wired, PD3.0, QC3, 100% in 52 min charging
Q3: What are the camera specs of Xiaomi Redmi K40?
20 MP, f/2.5, (wide), 1/3.4″, 0.8µm
Q4: What is the storage capacity of Xiaomi Redmi K40?
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
Q5: Does Xiaomi Redmi K40 support NFC?
Yes
Q6: What are the dimensions and weight of Xiaomi Redmi K40?
163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in) – Weight: 196 g (6.91 oz)
Q7: What chipset does Xiaomi Redmi K40 use?
Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
Q8: What is the price of Xiaomi Redmi K40?
About 280 EUR
