Samsung W21 5G vs Xiaomi Mix 4 (128GB)
Side by side comparison between Samsung W21 5G vs Xiaomi Mix 4 phones, differences, pros, cons and full specifications. What's the better?
,
7.6"
AMOLED
AMOLED
1768x2208
12.2
MP
MP
10mp
12GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
vs
6.67"
AMOLED
AMOLED
1080x2400
108
MP
MP
20mp
8GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
What's the better phone? Xiaomi Mix 4 (128GB)
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!
12 Advantages 
16 Advantages | 34 Common items in both devices |
| UFS 3.1 |
| HDR10+ / Dolby Vision/HDR10+ |
| 120Hz |
| Digital and optical zoom |
| PDAF: phase detection autofocus / LDAF/PDAF: laser/phase detection autofocus |
| OIS: Optical stabilization |
| BSI sensor |
| +27 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 | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Change model | ||
| Model | W21 5G | Mix 4 (128GB) |
| Other model names | 三星W21 5G SM-W2021 (China Telecom edition) | 小米MIX 4 2106118C (8GB RAM) |
| Country or region available |  China |  (Global, International) |
| Brand | Samsung | Xiaomi |
| Release date | 11/1/2020 | 8/16/2021, Announced: 8/10/2021 |
| Depth | 6.9 millimeters (0.27 inches) | 8 millimeters (0.31 inches) |
| Size (width x height) | 128.2 x 159.2 millimeters (5.05 x 6.27 in) | 75.35 x 162.65 millimeters (2.97 x 6.4 in) |
| Weight | 282 grams (9.87 ounces) | 225 grams (7.88 ounces) |
| Build, materials | Aluminum frame, flexible plastic screen, glass back | Aluminum body, glass front, ceramic back |
| Protection against water and others | Not supported | IP53 certified: protection against dust and splashing |
📲 Display | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Display type | Flexible Super AMOLED | AMOLED |
| Screen size | 7.6" inches | 6.67" inches |
| Screen-to-body ratio | ~89.1% (screen-to-body ratio) | ~87.6% (screen-to-body ratio) |
| Display resolution | 1768x2208 pixels | 1080x2400 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 372 PPI | 395 PPI |
| Colors | 16 million | 1 billion |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass Victus |
| Refresh rate | 120Hz | 120Hz |
| Display features | HDR10+ Extra display: Super AMOLED 6.23" (816x2260) Gorilla Glass Victus | Dolby Vision/HDR10+ Touch Sampling Rate: 480Hz |
🤖 Operating System | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| System version | Android 10 | Android 11 |
| Firmware update | Android 13 | Android 13 |
| User Interface | One UI 3.1 / 4.1 / 5.0 | MIUI 12.5 / 13 |
⚙️ Processor | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Chipset | 64bit: Qualcomm Snapdragon 865+ (SM8250-AB) (7nm) | 64bit: Qualcomm Snapdragon 888+ (SM8350-AC) (5nm) |
| CPU | Octa-core, 3 processors: 1x 3.09GHz Kryo 585 (Single-core) 3x 2.42GHz Kryo 585 (Triple-core) 4x 1.8GHz Kryo 585 (Quad-core) | Octa-core, 3 processors: 1x 3GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 650 (250-646MHz) | Qualcomm Adreno 660 (840MHz) |
| Performance (benchmark) | feature not registered | AnTuTu: 798010 (v9) |
💽 Memory and storage | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| RAM memory | 12GB LPDDR5 | 8GB LPDDR5 |
| Internal storage | 512GB (455GB available) UFS 3.1 | 128GB (101GB available) UFS 3.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 2000/1024 Mbps | 2000/1024 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 | GSM 850/900/1800/1900 | CDMA 800, GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1900/2100 | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 25, 26, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | 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 |
| Primary 5G network | Sub6 (1, 28, 41, 78, 79) | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 77, 78, 79) |
| Primary data network | GPRS, EDGE, 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 |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 850/900/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Secondary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 25, 26, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE | 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 |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Back camera (main camera) | (triple camera) 12.2 megapixels 12MP telephoto f/2.452mm1/3.6"1.0µmPDAFOIS2x-optical-zoom 12MP ultrawide f/2.2123°12mm1.12µm | (triple camera) 108 megapixels 13MP ultrawide f/2.212mm123°1/3.06"1.12µm 8MP periscope telephoto f/4.1120mmPDAFOIS5x-optical-zoom |
| Main camera resolution | 4032x3024 pixels | 12000x9000 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | 8K UHD (7680x4320) 24 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.9 (aperture) |
| Focal length | 26mm (lens) | 24mm (lens) |
| Sensor size | 1/1.76" inches | 1/1.33" inches |
| Pixel size | 1.8µm pixel | 0.8µm pixel |
| Autofocus | PDAF: 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 | Digital and optical 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 | Cover camera: 10MP (f/2.2) 4K@30/60fps 1080p@60fps 1080p@240fps (slow motion) 720p@960fps (slow motion) | 4K@30/60fps 1080p@30/60/120/480fps |
📸 Front camera | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Front camera (secondary) | 10 megapixels | 20 megapixels |
| Front camera resolution | 3872x2592 pixels | 5184x3840 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/3.4 (aperture) |
| Focal length | 26mm (lens) | 27mm (lens) |
| Sensor size | 1/3" inches | 1/0.8" inches |
| Pixel size | 1.22µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Stereo sound 24-bit/192kHz Tuned by Harman Kardon |
| 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 | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | Type-C jack with 3.5mm jack adapter |
| TV output | USB Type-C (reversible) | USB Type-C (reversible) |
| Bluetooth | 5.0 + A2DP/LE | 5.2 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC |
| NFC | Supported | Supported |
| Infrared port | Not supported | Supported |
🧭 Sensors | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Sensors | Accelerometer Ambient light sensor ANT+ Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (under display) Gyroscope Heart rate Proximity sensor UWB (Ultra Wideband) |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4500 mAh | 4500 mAh |
| Charger, watts | 25W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 | 120W Wired fast charging Reverse charging by cable Quick Charge 4 USB Power Delivery 3.0 |
| Inductive / wireless charging | 11W Qi Wireless charging (Qi/WPC) 4.5W Reverse wireless charging | 50W Qi wireless charging 10W Reverse wireless charging |
| Talk time autonomy | 31 hours (1.3 days) | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Samsung W21 5G | Xiaomi Mix 4 (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: Gold • Bixby • Samsung Wireless DeX • Samsung Pay (MST, NFC) | • Colors: Ceramic Black, Ceramic White, Shadow Gray • Silicone case included • Screen protector included |
☢️ Radiation rate | ||
| Samsung W21 5G | Xiaomi Mix 4 (128GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.859W/kg (head), 1.453W/kg (body) | feature not registered |