| Physical features | Xiaomi Redmi Note 9 |
| Model | |
| Other model names | Xiaomi Redmi Note 9 M2003J15SG Global version (NFC) |
| Country or region available | 
(Global, International) |
| Brand | Xiaomi |
| Release date | April, 2020 |
| Depth | 8.9 millimeters (0.35 inches) |
| Size (width x height) | 77.2 x 162.3 millimeters (3.04 x 6.39 in) |
| Weight | 199 grams (6.97 ounces) |
| Qwerty physical keyboard | Not supported |
| Antenna | Internal antenna |
| Build, materials | Plastic body, glass front |
| Protection against water and others | Water repellent nano-coating (don't immerse) |
| System (OS) | Xiaomi Redmi Note 9 |
| Operating system | Android 10 |
| Firmware update | Android 11 |
| Hardware | Xiaomi Redmi Note 9 |
| Chipset | 64bit - MediaTek Helio G85 (12nm) |
| CPU processor | Octa-Core, 2 processors:
2Ghz Dual-Core ARM-Cortex-A75
1.8Ghz Hexa-Core ARM-Cortex-A55 |
| GPU graphical controller | ARM Mali-G52 MC2 1Ghz |
| RAM memory | 4GB LPDDR4X |
| Internal storage | 128GB (106GB available)
eMMC 5.1 |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) |
| Display | Xiaomi Redmi Note 9 |
| Display type | TFT IPS LCD |
| Screen size | 6.53" inches |
| Screen-to-body ratio | ~83.5% (screen-to-body ratio) |
| Display resolution | 1080x2340 pixels (19.5:9) |
| Touchscreen | Capacitive Multitouch |
| Pixel density (dot pitch) | 395 PPI |
| Colors | 16 million |
| Scratch-resistant glass | Gorilla Glass 5 |
| Display features | 60Hz, 450 nits |
| Mobile networks | Xiaomi Redmi Note 9 |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 800/150 Mbps |
| Network technology | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat15/13 (Bands 1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (Bands 38, 40, 41)
VoLTE |
| Primary 5G network | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported |
| Secondary 4G network | Not supported |
| Secondary data network | GPRS, EDGE |
| Calling | Xiaomi Redmi Note 9 |
| Messaging | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported |
| Video calling | Supported |
| Call control | Voice dialing, Voice recorder, Voice commands |
| Camera | Xiaomi Redmi Note 9 |
| Back camera (main camera) | (quad camera)
48 megapixels
8MP ultrawidef/2.213mm1/4"1.12µm118º
2MP macrof/2.41.75µmAF
2MP depthf/2.41/5"1.7µm |
| Main camera resolution | 8000x6000 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps |
| Flash | LED flash |
| Focal aperture | f/1.8 (aperture) |
| Focal length | 26mm lens |
| Sensor size | 1/2" inches |
| Pixel size | 0.8µm pixel |
| Autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported |
| Image stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection |
| BSI sensor | Not supported |
| HDR | HDR photo on both cameras |
| 2ª camera | Xiaomi Redmi Note 9 |
| Front camera (secondary) | 13 megapixels |
| Front camera resolution | 4128x3096 pixels |
| Video recording (secondary) | Full HD (1920x1080) |
| Front flash | Not supported |
| Focal aperture | f/2.3 (aperture) |
| Focal length | 29mm lens |
| Sensor size | 1/3.06" inches |
| Pixel size | 1.12µm pixel |
| Multimedia | Xiaomi Redmi Note 9 |
| Radio | FM |
| TV | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC |
| Connectivity | Xiaomi Redmi Note 9 |
| USB | USB 2.0 Type-C, USB OTG On-The-Go |
| TV output | Not supported |
| Audio output | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO |
| DLNA | Not supported |
| NFC | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| Infrared port | Supported |
| Other functions | Xiaomi Redmi Note 9 |
| Active noise cancellation | Supported |
| Vibrating alert | Supported |
| Ringtones | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
|
| Other features | - Colors: Forest Green, Midnight Grey, Polar White
- MIUI 11, 12
- 22.5W charger (18W phone support)
- WiFi direct, hotspot |
| Power supply | Xiaomi Redmi Note 9 |
| Battery | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 5020 mAh |
| Charger, watts | 18W Fast battery charging
9W Reverse charging USB between devices |
| Talk time autonomy | 1980 minutes | 33 hours | 1.4 days |
| Standby | feature not registered |
| Radiation rate | Xiaomi Redmi Note 9 |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.84W/kg (head) | 0.9W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | 0.8W/kg (head) | 1.14W/kg (body) |