| Hardware and OS | Xiaomi Redmi Note 9 4G | |
| Operating system | Android 10.0, MIUI 12 | |
| Processor | Octa-core (4x2.0 GHz Kryo 260 Gold, 4x1.8 GHz Kryo 260 Silver) | |
| GPU | Adreno 610 | |
| RAM | 4 GB, 6 GB, 8 GB | |
| Internal Storage | 128 GB, 256 GB | |
| Memory Card Slot | microSDXC (dedicated slot) | |
| User Interface | Yes | |
| Display | Xiaomi Redmi Note 9 4G | other phones |
| Type | IPS LCD | |
| Size | 6.53 inches | |
| Resolution | 1080 x 2340 pixels | |
| Colors | 16M Colors | |
| Pixel Density | 395 ppi | |
| Touchscreen | Capacitive touchscreen | |
| Protection | Corning Gorilla Glass 3 | |
| Connectivity | Xiaomi Redmi Note 9 4G | other phones |
| 4G Network | 1, 3, 5, 8, 34, 38, 39, 40, 41 | |
| 5G Network | No | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| NFC | No | |
| USB | USB Type-C 2.0, USB On-The-Go | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A | |
| SIM | Nano SIM | |
| Dual SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Wireless Charging | No | |
| Camera | Xiaomi Redmi Note 9 4G | other phones |
| Main camera | 48 MP (wide), 8 MP (ultrawide), 2 MP (macro) | |
| Features | LED flash, HDR, panorama | |
| Image | 1080p | |
| Selfie camera | 8 MP (wide) | |
| Multimedia | Xiaomi Redmi Note 9 4G | other phones |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Radio | Yes | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | Yes | |
| Design | Xiaomi Redmi Note 9 4G | other phones |
| Dimensions | 162.3 x 77.3 x 9.6 mm | |
| Waterproof | Water-repellent coating | |
| Weight | 198 g | |
| Battery | Xiaomi Redmi Note 9 4G | other phones |
| Capacity | Li-Po 6000 mAh, Fast charging 18W, Reverse charging 2.5W | |
| Placement | Non-removable | |
| Other | Xiaomi Redmi Note 9 4G | other phones |
| Sensors | Fingerprint (side-mounted), accelerometer, proximity, compass, | |
