Redmi K40
| Type | Touch |
| Dimensions | 163.70 x 76.40 x 7.80 mm |
| Weight | 196.00 g |
| Display size | 6.67" |
| Display | Color / AMOLED 16M colors 120 Hz 1080 x 2400 px (6.67") 395 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
 |
| Additional display |  |
| Protection of the secondary display | |
| Standard battery | Li-Po 4520 mAhBuy powerbank
|
| Quick battery charging | Quick Charge 3.0 |
| Wireless battery charging | |
| Internal memory | 128 GB, 256 GB |
| RAM memory | 6 GB, 8 GB, 12 GB |
| Memory cards | |
| Operating system | Android 11 |
| Interface | MIUI 12 |
| Processor | Qualcomm Snapdragon 870 SM8250 |
| Processor clock | 3200 MHz |
| GPU | Adreno 650 |
| Touchscreen |  |
| DualSIM | |
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby |
| Hybrid DualSIM | |
| Announced | 1Q 2021 |
| Other names | M2012K11AC; Xiaomi Redmi K40 |
| GSM frequencies | 850 900 1800 1900 |
| UMTS | 850 900 1700 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 700 TDD LTE: 3500, 2600, 2500, 2300, 2100, 1900 |
| Standard 5G | FDD 5G: 2100, 1800, 700 TDD 5G: 3700, 3500, 2500 |
| CDMA | |
| Standard TD-SCDMA | |
| UMA | |
CAMERAS - BACK
| First camera | |
| Camera type | Standard |
| Photo sensor model | Sony IMX582 |
| Photo matrix | 48 Mpx |
| Sensor size | 1/2 |
| Pixel size | 0,8 µm |
| Resolution | 8000x6000 px |
| Optical zoom | |
| Flash | LED |
| Dual-colour LED flash | |
| Video resolution | 2840x2160 px |
| Video formats | H.264, H.265, MPEG4 - 30 fps |
| Additional | AF, EIS, f/1.79 |
| Second camera | |
| Camera type | Wide-angle |
| Photo sensor model | Sony IMX355 |
| Photo matrix | 8 Mpx |
| Optical zoom | |
| Field of view | 119 ° |
| Flash | LED |
| Dual-colour LED flash | |
| Video formats | H.264, H.265, MPEG4 - 30 fps |
| Additional | FF |
| Third camera | |
| Camera type | Macro |
| Photo sensor model | Samsung S5K5E9 |
| Photo matrix | 5 Mpx |
| Sensor size | 1/5 |
| Pixel size | 1,12 µm |
| Resolution | 2592x1944 px |
| Optical zoom | |
| Focal length | 50 mm |
| Flash | LED |
| Dual-colour LED flash | |
| Video formats | H.264, H.265, MPEG4 - 30 fps |
| Additional | EIS |
CAMERAS - FRONT
| First camera | |
| Camera type | Portrait |
| Photo sensor model | Samsung S5K3T2 |
| Photo matrix | 20 Mpx |
| Sensor size | 1/3,4 |
| Pixel size | 0,8 µm |
| Resolution | 5184x3880 px |
| Optical zoom | |
| Flash | |
| Dual-colour LED flash | |
| Video resolution | 1920x1080 px |
| Video formats | H.264, H.265, MPEG4 - 30 fps |
| Additional | FF |
SENSORS
| Accelerometer | |
| Proximity | |
| Light | |
| Magnetometer | |
| Gyroscope | |
| Altimeter | |
| Gravity | |
| Hall-effect | |
| Iris scanner | |
| Fingerprint scanner | |
| Thermometer | |
| Hygrometer | |
Data transfer
| xHTML | |
| WAP | v2.0 |
| HSCSD | |
| HSDPA | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s |
| HSPA | |
| HSPA+ | |
| LTE DL | 1174.00 Mbit/s |
| LTE UP | 210.00 Mbit/s |
| WIMAX+ | |
| GPRS | |
| EDGE | class 8 |
| Bluetooth | v5.1 |
| A2DP Profile | |
| HDMI | |
| WiFi | v802.11 a/b/g/n/ac/ax |
| WiFi frequencies | 2,4 GHz; 5 GHz |
| WiFi Direct | |
| WiFi Display | |
| DLNA | |
| Miracast | |
| WiFi hotspot | |
| IrDA | |
| USB | v3.0 Type-C |
| GPS | |
| A-GPS | |
| GLONASS | |
| Beidou | |
| Galileo | |
| QZSS | |
| NFC | |
COMMUNICATION AND MESSAGING
| Call waiting | |
| Conferency | |
| Call forwarding | |
| Push To Talk | |
| Instant Messenger | |
| SMS | |
| EMS | |
| MMS | |
| Dictionary | T9 |
| Swype | |
| e-mail client | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | |
| RSS Reader | |
Multimedia
| Radio | |
| MP3 | |
| Stereo speakers | 2 |
| Audio Jack | |
| HD Voice | |
| Sound formats | AAC, AAC+, AMR, APE, AWB, DSF, FLAC, M4A, MID, OGG, WAV, WMA, eAAC+ |
| Polyphony | |
| Video ringtone | |
| Ring composer | |
| Games | |
| Java | ART |
| Videophone | |
| DVB-H television | |
| TV-Out | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | |
| Stopwatch | |
| Alarm | |
| Calculator | |
| Currency converter | |
| Organizer | |
| Calendar | |
| Flight mode | |
| SyncML | |
| Data and fax | |
| Screensaver | |
| Themes | |
| Interchangeable covers | |
| Voice dial | |
| Speakerphone | |
| Recorder | |
| Vibrations | |