| Hardware and OS | Xiaomi Redmi Note 9T 5G | |
| Operating system | Android 10, MIUI 12 | |
| Processor | Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) | |
| Chipset | MediaTek MT6853 Dimensity 800U 5G (7 nm) | |
| Internal memory | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM | |
| External memory | microSDXC (dedicated slot) | |
| GPU | Mali-G57 MC3 | |
| Display | Xiaomi Redmi Note 9T 5G | other phones |
| Size | 6.53 inches, 104.7 cm2 | |
| Resolution | 1080 x 2340 pixels, 19.5:9 ratio | |
| Type | IPS LCD, 450 nits (typ) | |
| Protection | Corning Gorilla Glass 5 | |
| Main Camera | Xiaomi Redmi Note 9T 5G | other phones |
| Camera | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF
2 MP, f/2.4, (macro)
2 MP, f/2.4, (depth) | |
| Features | LED flash, HDR, panorama | |
| Video | 4K@30fps, 1080p@30/60fps | |
| Selfie camera | Xiaomi Redmi Note 9T 5G | other phones |
| Camera | 13 MP, f/2.3, 29mm (standard), 1/3.1", 1.12µm | |
| Video | 1080p@30fps | |
| Connectivity | Xiaomi Redmi Note 9T 5G | other phones |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 40, 41, 42 | |
| 5G Network | 1, 3, 5, 7, 8, 20, 28, 38, 41, 77, 78, 79 SA/NSA/Sub6 | |
| Bluetooth | 5.1, A2DP, LE | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| Infrared port | Yes | |
| NFC | Yes | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A, 5G | |
| Technology | GSM / HSPA / LTE / 5G | |
| USB | USB Type-C 2.0 | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| Multimedia | Xiaomi Redmi Note 9T 5G | other phones |
| 3.5 mm Jack | Yes | |
| Loudspeaker | Yes, with stereo speakers | |
| Multimedia | 24-bit/192kHz audio | |
| Radio | FM radio, recording | |
| Battery | Xiaomi Redmi Note 9T 5G | other phones |
| Type | Li-Po 5000 mAh, non-removable | |
| Charging | Fast charging 18W, 33% in 30 min | |
| Design | Xiaomi Redmi Note 9T 5G | other phones |
| Body build | Glass front (Gorilla Glass 5), plastic back, plastic frame | |
| Body | Water-repellent coating | |
| Colors | Nightfall Black, Daybreak Purple | |
| Dimensions | 161.2 x 77.3 x 9.1 mm (6.35 x 3.04 x 0.36 in) | |
| Weight | 199 g (7.02 oz) | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Features | Xiaomi Redmi Note 9T 5G | other phones |
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass | |
