| Hardware and OS | Redmi 9 Activ 128GB 6GB RAM | |
| Operating system | Android v11 | |
| Processor | MediaTek Helio G35 | |
| RAM | 6 GB | |
| Internal Storage | 128 GB | |
| Expandable memory | Yes, Upto 512 GB | |
| Custom UI | MIUI | |
| Display | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Type | HD Dot Drop | |
| Size | 6.53 inches | |
| Resolution | 720 x 1600 Pixels | |
| Touchscreen | Yes, Capacitive Touchscreen, Multi-touch | |
| Aspect ratio | 20:9 | |
| Screen to body ratio calculated | 81.03 % | |
| Connectivity | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Network support | 4G , 3G, 2G | |
| WI-FI | Yes, Wi-Fi 802.11, b/g/n | |
| Gps | Yes, with A-GPS, Glonass | |
| Bluetooth | Yes, v5.0 | |
| Dual SIM | Dual SIM, GSM GSM | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| USB connectivity | Mass storage device, USB charging, microUSB 2.0 | |
| Camera | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Main camera | 13 MP 2 MP | |
| Image | 4128 x 3096 Pixels | |
| Front camera | 5 MP | |
| Front camera resolution | 5 MP f/2.2 Primary Camera | |
| Camera features | Digital Zoom, Auto Flash, Face detection, Touch to focus | |
| Flash | Yes, LED Flash | |
| Autofocus | Yes | |
| Video recording | 1920x1080 @ 30 fps | |
| Multimedia | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Audio jack | 3.5 MM | |
| FM radio | Yes | |
| Loudspeaker | Yes | |
| Design | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Height | 164.9 mm | |
| Width | 77.07 mm | |
| Thickness | 9.0 mm | |
| Weight | 194 grams | |
| Colours | Carbon Black, Coral Green, Metallic Purple | |
| Battery | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Capacity | 5000 mAh | |
| Type | Li-Polymer | |
| Other | Redmi 9 Activ 128GB 6GB RAM | other phones |
| Fingerprint sensor | Yes | |
| Fingerprint sensor position | Rear | |
| Other sensors | Vibration Motor, Distance Sensor, Ambient Light Sensor, Accelerometer, AI Face Unlock | |
