| Hardware and OS | Redmi 9 128GB 6GB RAM | |
| Operating system | Android v10 (Q) | |
| Processor | 2.3GHz, 8x A53, Octa-core | |
| Chipset | MediaTek Helio G35 | |
| Internal Storage | 128 GB | |
| Expandable memory | Yes, Upto 256 GB | |
| GPU | PowerVR8320 | |
| RAM | 6 GB | |
| Camera | Redmi 9 128GB 6GB RAM | other phones |
| Main camera | 13 MP 2 MP | |
| Aperture | F2.2 | |
| Autofocus | Yes | |
| Flash | Yes, LED Flash | |
| Front camera | 5 MP | |
| Front camera resolution | 5 MP Primary Camera | |
| Video recording | Yes | |
| Connectivity | Redmi 9 128GB 6GB RAM | other phones |
| Bluetooth | Yes, v5.0 | |
| SIM size | SIM1: Nano, SIM2: Nano | |
| Dual SIM | Dual SIM, GSM GSM, Dual VoLTE | |
| GPS | Yes, with A-GPS | |
| Network support | 4G , 3G, 2G | |
| USB connectivity | Mass storage device, USB charging | |
| WI-FI | Yes, Wi-Fi 802.11 b/g/n | |
| Multimedia | Redmi 9 128GB 6GB RAM | other phones |
| FM radio | Yes | |
| Loudspeaker | Yes | |
| Battery | Redmi 9 128GB 6GB RAM | other phones |
| Capacity | 5000 mAh | |
| Design | Redmi 9 128GB 6GB RAM | other phones |
| Colors | Carbon Grey, Sky Blue, Sporty Orange | |
| Height | 164.9 mm | |
| Width | 77.07 mm | |
| Thickness | 9.0 mm | |
| Weight | 196 g | |
| Features | Redmi 9 128GB 6GB RAM | other phones |
| Fingerprint sensor position | Rear | |
| Fingerprint sensor | Yes | |
| Other sensors | Distance Sensor, Ambient Light Sensor, Accelerometer, Vibration Motor | |
