| Physical features | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Model | Mi 9 Lite (128GB) | Redmi Note 4 (32GB/3GB) |
| Other model names | Xiaomi 9 Lite M1904F3BG (Global), Xiaomi Pyxis | Redmi Note 4 Snapdragon (3GB RAM), Xiaomi MarkW |
| Country or region available | 
(Global, International) |  
Brazil, India, (Global, International) |
| Brand | Xiaomi | Xiaomi |
| Release date | September, 2019 | January, 2017 |
| Depth | 8.67 millimeters (0.34 inches) | 8.45 millimeters (0.33 inches) |
| Size (width x height) | 74.5 x 156.8 millimeters (2.93 x 6.17 in) | 76 x 151 millimeters (2.99 x 5.94 in) |
| Weight | 179 grams (6.27 ounces) | 165 grams (5.78 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Aluminum frame, glass front/back | Aluminum body, glass front |
| Protection against water and others | Not supported | Not supported |
| System (OS) | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Operating system | Android 9.0 Pie | Android 6.0.1 Marshmallow |
| Firmware update | Android 10 | Android 7.0 Nougat |
| Hardware | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Chipset | 64bit - Qualcomm Snapdragon 710 SDM710 (10nm) | 64bit - Qualcomm Snapdragon 625 MSM8953 (14nm) |
| CPU processor | Octa-Core, 2 processors:
2.2Ghz Dual-Core Kryo 360 Gold
1.7Ghz Hexa-Core Kryo 360 Silver | 2Ghz Octa-Core ARM Cortex-A53 |
| GPU graphical controller | Qualcomm Adreno 616 500Mhz | Qualcomm Adreno 506 650Mhz |
| RAM memory | 6GB LPDDR4X | 3GB LPDDR3 |
| Internal storage | 128GB (109GB available)
UFS 2.1 | 32GB (22GB available) |
| External storage | Until 256GB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot) | Until 256GB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot) |
| Display | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Display type | Super AMOLED | TFT IPS LCD |
| Screen size | 6.39" inches | 5.5" inches |
| Screen-to-body ratio | ~85.8% (screen-to-body ratio) | ~72.7% (screen-to-body ratio) |
| Display resolution | 1080x2340 pixels (19.5:9) | 1080x1920 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 403 PPI | 401 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 5 | Not supported |
| Display features | 60Hz, 430 nits, HDR8 | feature not registered |
| Mobile networks | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot) | Dual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot) |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 2 slots (Dual-SIM)
micro-SIM (3FF) and nano-SIM (4FF) |
| Maximum download/upload | 800/150 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat15/13 (1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (38, 40)
VoLTE | LTE Cat4 850/1800 (Bands 3,5)
TD-LTE 2300 (Bands 40) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | UMTS 850/900/1900/2100 |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | GPRS, EDGE |
| Calling | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder, Voice commands |
| Camera | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Back camera (main camera) | (triple camera)
48 megapixels
8MP ultrawidef/2.21/4"13mm
2MP depthf/2.4 | 13 megapixels |
| Main camera resolution | 8000x6000 pixels | 4128x3096 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | 25mm lens | feature not registered |
| Sensor size | 1/2" inches | feature not registered |
| Pixel size | 0.8µm pixel | 1.12µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Supported |
| HDR | HDR photo on both cameras | HDR photo on both cameras |
| 2ª camera | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Front camera (secondary) | 32 megapixels | 5 megapixels |
| Front camera resolution | 6528x4896 pixels | 2592x1944 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | 1.6µm pixel | feature not registered |
| Multimedia | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, OGG, eAAC+, FLAC |
| Connectivity | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE | 4.1 + A2DP |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO | 802.11 a/b/g/n (2.4Ghz, 5Ghz) |
| DLNA | Not supported | Not supported |
| NFC | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, BeiDou |
| Infrared port | Supported | Supported |
| Other functions | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Active noise cancellation | Supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (under display)
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Fingerprint sensor
Hall effect
|
| Other features | - Colors: Black, Blue, White
- MIUI 10
- WiFi direct, hotspot | - Colors: Black, Gold, Gray
- USB OTG On-The-Go
- Aluminum body
- 2.5D curved glass
- MIUI 8.0
- 720p@120fps slow-motion
- 24-bit/192kHz audio
- WiFi display
- WiFi direct, hotspot |
| Power supply | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| Battery | LiPo: Li-Ion polymer (Non removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 4030 mAh | 4100 mAh |
| Charger, watts | 18W (9V/2A) Fast battery charging | Standard charging |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
| Radiation rate | Xiaomi Mi 9 Lite (128GB) | Xiaomi Redmi Note 4 (32GB/3GB) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 1.19W/kg (head) | 1.15W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 1.42W/kg (head) | 1.4W/kg (body) | feature not registered |