Il Redmi K40 is a smartphone Android home redmi, independent brand but under the control of Xiaomi. It came out in early 2021 and is part of the mid-range category (for the price) even if we can call it a TRUE flagship Redmi: to justify this the AnTuTu score, the hardware equipment and the photographic sector . Thanks to the processor Snapdragon 870 and Adreno GPU 650, can excellently satisfy any function without danger of jamming. It is equipped with a touchscreen display 6.67 '' AMOLED (bright colors and deep blacks) with a resolution of 1080 2400 pixels x and camera integrated in the display (central hole). The photographic sector consists of a triple rear cam from 48 + 8 + 5 megapixel which allows you to take better pictures than those taken by other mid-ranges with and record excellent 4K 30fps video. At the network level, it is obviously equipped with a module LTE Dual 4G, Wi-Fi and Dual GPS. The available memory cuts are 6/8/12 GB RAM and 128/256 GB ROM (Chinese version).
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Technical Sheet
HUMAN
| Dimensions: | 163.7 x 76.4 x 7.8 mm |
| Weight: | 196 g |
| Materials: | Glass and aluminum alloy |
| Color: | Blue – White – Black |
DISPLAY
| Technology: | AMOLED up to 120Hz |
| Size: | 6.67 " |
| Resolution: | Full HD + (2400 x 1080) |
| Form factor: | 20:9 |
| Pixel density: | 483 ppi |
| Brightness: | 1300 maximum nits |
| Protection: | Corning Gorilla Glass 5 |
| 2.5D processing | SI |
HARDWARE
| Processor: | Qualcomm Snapdragon 870 |
| Freq. clock and structure: | Octa-Core 64-bit (1 x Cortex A77 at 3,2 GHz + 3 x Cortex A77 at 2,40 GHz + 4 x Cortex A55 at 1,80 GHz) |
| GPU: | Adreno 650 |
| RAM: | 6 / 8 / 12 GB LPDDR5 |
| Internal Mem.: | 128 / 256 GB UFS 3.1 |
| Esp. Memory | SI |
| Fingerprint reader | SI |
| Pos. Fingerprint reader: | Integrated on the side |
| Sensors: | Brightness, accelerometer, gyroscope, fingerprints, IR facial recognition, compass |
SOFTWARE
| Operating system: | Android 11 |
| MIUI user interface / version: | MIUI 12 |
BATTERY
| Capacity: | 4520 mAh |
| Type: | Li-Poly |
| Charge speed support: | Quick Charge 4+ 33W |
VULNERABILITY ASSESSMENT
| SIM 1: | Nano |
| SIM 2: | Nano-Micro SD |
| CDMA: | BC0 |
| 2G-rule: | B2 / B3 / B5 / B8 |
| 3G-rule: | B1/B2/B5/B8/B34/B39 |
| 4G LTE FDD: | B1/B3/B5/B7/B8/B20 |
| 4G LTE TDD: | B34/B38/B39/B40/B41/B20 |
| Dual 4G support | SI |
| 5G-rule: | N1/N3/N41/N78/N79 |
CONNECTIVITY
| Bluetooth: | 5.1 with A2DP and LE (Low Energy) |
| Wifi: | 802.11 a, b, g, WiFi 6 |
| USB: | Type-C 2.0 with OTG support |
| GPS: | Dual GPS, A-GPS, Glonass, Beidou, Galileo |
| NFC | SI |
| FM radio | SI |
| IR transmitter | SI |
| Video output | SI |
CAMERA
| No. Sensors: | Triple back room |
| Triple back room | SI |
| Primary sensor: | Sony IMX582 |
| Resolution: | 48 megapixel |
| Aperture / Pixel Size: | f 1.79 / 1.6 μm |
| Autofocus: | Dual focus |
| Stabilizer | SI |
| ICE CREAM | SI |
| AI technology | SI |
| Flash: | Dual Flash LED |
| Second Sensor: | Wide |
| Resolution: | 8 megapixel |
| Third Sensor: | Macro |
| Resolution: | 5 megapixel |
| Video: | Up to 4K 30 fps |
| Time Lapse | SI |
| Slow Motion | SI |
| Front sensor: | Single |
| Resolution: | 20 megapixel |
AUDIO
| Speaker: | stereo |
VARIOUS
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