| Physical features | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Model | Redmi 9 (128GB/4GB) | Xperia X Compact (F5321) |
| Other model names | Xiaomi Redmi 9 M2004J19C | Sony Xperia X Compact Single-Sim, Sony Kugo SS |
| Country or region available | 
China | 
(Global, International) |
| Brand | Xiaomi | Sony |
| Release date | June, 2020 | September, 2016 |
| Depth | 9.1 millimeters (0.36 inches) | 9.5 millimeters (0.37 inches) |
| Size (width x height) | 77.01 x 163.32 millimeters (3.03 x 6.43 in) | 65 x 129 millimeters (2.56 x 5.08 in) |
| Weight | 198 grams (6.93 ounces) | 135 grams (4.73 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | Not supported | Not supported |
| System (OS) | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Operating system | Android 10 | Android 6.0.1 Marshmallow |
| Firmware update | feature not registered | Android 7.0 Nougat |
| Hardware | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Chipset | 64bit - Mediatek Helio G80 (12nm) | 64bit - Qualcomm Snapdragon 650 MSM8956 (28nm) |
| CPU processor | Octa-Core, 2 processors:
2Ghz Dual-Core ARM Cortex-A75
1.8Ghz Hexa-Core ARM Cortex-A55 | Hexa-Core, 2 processors:
1.8Ghz Dual-Core ARM Cortex-A72
1.4Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | ARM Mali-G52 MC2 950Mhz | Qualcomm Adreno 510 600Mhz |
| RAM memory | 4GB LPDDR4X | 3GB LPDDR3 |
| Internal storage | 128GB (106GB available)
eMMC 5.1 | 32GB (22GB available) |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) | Until 256GB microSD, microSDXC
(dedicated slot) |
| Display | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 6.53" inches | 4.6" inches |
| Screen-to-body ratio | ~83.2% (screen-to-body ratio) | ~69.6% (screen-to-body ratio) |
| Display resolution | 1080x2340 pixels (19.5:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 395 PPI | 319 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Gorilla Glass 4 |
| Display features | 60Hz, 400 nits | feature not registered |
| Mobile networks | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) | Not supported |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 1 slot (Single-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 300/50 Mbps | 300/50 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 800/850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat6 (1, 2, 3, 4, 5, 7, 8, 20, 28)
TD-LTE (38, 40, 41)
VoLTE | LTE Cat6 700/800/850/900/1700/1800/1900/2100/2600 (Bands 1,2,3,4,5,7,8,12,17,19,20,26,28)
TD-LTE 1900/2300/2500/2600 (Bands 38,39,40,41) |
| 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+, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| 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 commands | Voice dialing, Voice recorder, Voice commands |
| Camera | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Back camera (main camera) | (quad camera)
13 megapixels
8MP ultrawidef/2.2118º1/4.0"1.12µm
5MP macrof/2.4
2MP depthf/2.4 | 23 megapixels |
| Main camera resolution | 4128x3096 pixels | 5536x4152 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 60 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/2.2 (aperture) | f/2.0 (aperture) |
| Focal length | 28mm lens | feature not registered |
| Sensor size | 1/3.1" inches | 1/2.3" inches |
| Pixel size | 1.12µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | feature not registered |
| 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/video only main camera |
| 2ª camera | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Front camera (secondary) | 8 megapixels | 5 megapixels |
| Front camera resolution | 3264x2448 pixels | 2592x1944 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | 27mm lens | feature not registered |
| Sensor size | 1/4" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Multimedia | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Radio | FM | FM (RDS) |
| 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, WAV, eAAC+, FLAC |
| Connectivity | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | USB 2.0 Type-C reversible connector |
| TV output | USB Type-C (reversible) | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE | 4.2 + A2DP |
| WiFi | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) |
| DLNA | Not supported | Supported |
| NFC | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS, BeiDou |
| Infrared port | Supported | Not supported |
| Other functions | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| 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
Face unlock
Fingerprint sensor (rear-mounted)
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Barometer
Fingerprint sensor
|
| Other features | - Colors: Carbon Gray, Sunset Purple, Ocean Green, Pink/Blue
- MIUI 11
- 10W charger included
- WiFi direct, hotspot
- AnTuTu: 201829 (v8) | - Colors: Black, White, Mist Blue
- USB OTG On-The-Go
- Triluminos 2.5D curved display
- Oleophobic coating
- Fingerprint sensor
- PDAF on back camera
- Sony Exmor RS on back camera
- Sony Exmor R on front camera
- Fast battery charging
- Quick Charge 3.0
- Sony ClearAudio+
- PS4 integration
- WiFi direct, hotspot |
| Power supply | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| Battery | LiPo: Li-Ion polymer (Non removable) | Li-Ion: Lithium-Ion (Non removable) |
| Battery capacity | 5020 mAh | 2700 mAh |
| Charger, watts | 18W Fast battery charging | Standard charging |
| Talk time autonomy | 1860 minutes | 31 hours | 1.3 days | 840 minutes | 14 hours | 0.6 day |
| Standby | feature not registered | 45000 minutes | 750 hours | 31.3 days |
| Radiation rate | Xiaomi Redmi 9 (128GB/4GB) | Sony Xperia X Compact (F5321) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.91W/kg (head) | 1W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.71W/kg (head) | 1.06W/kg (body) | feature not registered |