| Hardware and OS Xiaomi Redmi K40s |
| Operating system: | Android v11 |
| Processor: | Qualcomm Snapdragon 870 |
| RAM: | 6 GB |
| Internal Storage: | 128 GB |
| Display Xiaomi Redmi K40s |
| Type: | AMOLED |
| Size: | 6.67 inches |
| Resolution: | 1080 x 2400 Pixels |
| Pixel Density: | 395 ppi |
| Touchscreen: | Yes, Capacitive Touchscreen, Multi-touch |
| Aspect ratio: | 20:9 |
| Connectivity Xiaomi Redmi K40s |
| Network support: | 5G , 4G , 3G, 2G |
| WI-FI: | Yes, Wi-Fi 802.11, b/g/n |
| Gps: | Yes, with A-GPS, Glonass |
| Bluetooth: | Yes, v5.1 |
| Dual SIM: | Dual SIM, GSM GSM |
| SIM size: | SIM1: Nano, SIM2: Nano |
| USB connectivity: | Mass storage device, USB charging |
| Camera Xiaomi Redmi K40s |
| Main camera: | 48 MP 8 MP 5 MP |
| Front camera: | 20 MP |
| Front camera resolution: | 20 MP |
| Camera features: | Digital Zoom, Auto Flash, Face detection, Touch to focus |
| Flash: | Yes, LED Flash |
| Autofocus: | Yes |
| Video recording: | Yes |
| Multimedia Xiaomi Redmi K40s |
| Audio jack: | 3.5 MM |
| Loudspeaker: | Yes |
| Design Xiaomi Redmi K40s |
| Height: | 163.7 mm |
| Width: | 76.4 mm |
| Thickness: | 7.8 mm |
| Weight: | 196 grams |
| Colours: | Black |
| Battery Xiaomi Redmi K40s |
| Capacity: | 4520 mAh |
| Type: | Li-Polymer |
| Other Xiaomi Redmi K40s |
| Fingerprint sensor: | Yes |
| Fingerprint sensor position: | Side |
| Other sensors: | Accelerometer, Gyro, Proximity, Compass |
