Xiaomi Mix 4 (256GB/8GB) vs OnePlus 9 Pro UW (128GB)
Side by side comparison between Xiaomi Mix 4 vs OnePlus 9 Pro phones, differences, pros, cons and full specifications. What's the better?
,
6.67"
AMOLED
AMOLED
1080x2400
108
MP
MP
20mp
8GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
vs
6.7"
AMOLED
AMOLED
1440x3216
48
MP
MP
16mp
8GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
What's the better phone? Xiaomi Mix 4 (256GB/8GB)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
13 Advantages 
10 Advantages | 37 Common items in both devices |
| 8GB LPDDR5 |
| UFS 3.1 |
| Dolby Vision/HDR10+ / HDR10+ |
| 120Hz |
| 1 billion |
| Dual-LED flash |
| LDAF/PDAF: laser/phase detection autofocus |
| +30 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Model | Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) |
| Other model names | 小米MIX 4 2106118C (8GB RAM) | OnePlus 9 Pro 5G LE2121 (T-Mobile) UltraWideband |
| Country or region available |  (Global, International) |  USA |
| Brand | Xiaomi | OnePlus |
| Release date | 8/16/2021, Announced: 8/10/2021 | 3/30/2021, Announced: 3/23/2021 |
| Depth | 8 millimeters (0.31 inches) | 8.7 millimeters (0.34 inches) |
| Size (width x height) | 75.35 x 162.65 millimeters (2.97 x 6.4 in) | 73.6 x 163.2 millimeters (2.9 x 6.43 in) |
| Weight | 225 grams (7.88 ounces) | 197 grams (6.9 ounces) |
| Build, materials | Aluminum body, glass front, ceramic back | Aluminum frame, glass front/back |
| Protection against water and others | IP53 certified: protection against dust and splashing | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Display type | AMOLED | Fluid AMOLED |
| Screen size | 6.67" inches | 6.7" inches |
| Screen-to-body ratio | ~87.6% (screen-to-body ratio) | ~89.9% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 1440x3216 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 395 PPI | 526 PPI |
| Colors | 1 billion | 1 billion |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass 5 |
| Refresh rate | 120Hz | 120Hz |
| Display features | Dolby Vision/HDR10+ Touch Sampling Rate: 480Hz | 1300nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| System version | Android 11 | Android 11 |
| Firmware update | Android 13 | Android 13 |
| User Interface | MIUI 12.5 / 13 | OxygenOS 13 |
⚙️ Processor | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 888+ (SM8350-AC) (5nm) | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) |
| CPU | Octa-core, 3 processors: 1x 3GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 660 (840MHz) | Qualcomm Adreno 660 (840MHz) |
| Performance (benchmark) | AnTuTu: 798010 (v9) | feature not registered |
💽 Memory and storage | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| RAM memory | 8GB LPDDR5 | 8GB LPDDR5 |
| Internal storage | 256GB (218GB available) UFS 3.1 | 128GB (101GB available) UFS 3.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 2000/1024 Mbps | 5000/1024 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800, GSM 850/900/1800/1900 | CDMA 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO UMTS 800/850/900/1700/1800/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28) TD-LTE (34, 38, 39, 40, 41, 42) VoLTE | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 66, 71) TD-LTE (38, 39, 40, 41, 46, 48) VoLTE |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 77, 78, 79) | SA/NSA (1, 2, 3, 7, 25, 28, 41, 66, 71, 78) mmWave (258, 260, 261) |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28) TD-LTE (34, 38, 39, 40, 41, 42) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | Not supported |
📷 Camera | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Back camera (main camera) | (triple camera) 108 megapixels 13MP ultrawide f/2.212mm123°1/3.06"1.12µm 8MP periscope telephoto f/4.1120mmPDAFOIS5x-optical-zoom | (quad camera) 48 megapixels 8MP telephoto f/2.477mm1.0µmPDAFOIS3.3x-optical-zoom 50MP ultrawide f/2.214mm1/1.56"1.0µmAF 2MP monochrome f/2.4 |
| Main camera resolution | 12000x9000 pixels | 8000x6000 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 24 fps | 8K UHD (7680x4320) 30 fps |
| Flash | Dual-LED flash | Dual-LED flash |
| Focal aperture | f/1.9 (aperture) | f/1.8 (aperture) |
| Focal length | 24mm (lens) | 23mm (lens) |
| Sensor size | 1/1.33" inches | 1/1.43" inches |
| Pixel size | 0.8µm pixel | 1.12µm pixel |
| Autofocus | LDAF/PDAF: laser/phase detection autofocus | LDAF/PDAF: laser/phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | OIS: Optical stabilization |
| Zoom | Digital and optical zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo/video on both cameras | HDR photo/video on both cameras |
| Camera extras | 4K@30/60fps 1080p@30/60/120/480fps | 4K@30/60/120fps 1080p@30/60/240fps Hasselblad Color Calibration Sony IMX689, IMX766. IMX471 sensor |
📸 Front camera | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Front camera (secondary) | 20 megapixels | 16 megapixels |
| Front camera resolution | 5184x3840 pixels | 4608x3456 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/3.4 (aperture) | f/2.4 (aperture) |
| Focal length | 27mm (lens) | feature not registered |
| Sensor size | 1/0.8" inches | 1/3.06" inches |
| Pixel size | 0.8µm pixel | 1µm pixel |
🔉 Sound and multimedia | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Loudspeaker | Stereo sound 24-bit/192kHz Tuned by Harman Kardon | Stereo sound with dual speakers 24-bit/192kHz Dolby Atmos |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | USB 3.1 Type-C, USB OTG On-The-Go |
| Audio output | Type-C jack with 3.5mm jack adapter | Type-C reversible connector |
| TV output | USB Type-C (reversible) | USB Type-C (reversible) |
| Bluetooth | 5.2 + A2DP/LE | 5.2 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, SBAS |
| NFC | Supported | Supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Heart rate Proximity sensor UWB (Ultra Wideband) | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4500 mAh | 4500 mAh |
| Charger, watts | 120W Wired fast charging Reverse charging by cable Quick Charge 4 USB Power Delivery 3.0 | 65W (10V/6.5A) Wired fast charging USB Power Delivery 1.0 |
| Inductive / wireless charging | 50W Qi wireless charging 10W Reverse wireless charging | 50W Qi Wireless charging (Qi/WPC) |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Ceramic Black, Ceramic White, Shadow Gray • Silicone case included • Screen protector included | • Colors: Stellar Black, Morning Mist, Pine Green |
☢️ Radiation rate | ||
| Xiaomi Mix 4 (256GB/8GB) | OnePlus 9 Pro UW (128GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |