Fairphone 4 (128GB) vs Sony Xperia U (ST25i)
Side by side comparison between Fairphone 4 vs Sony Xperia U phones, differences, pros, cons and full specifications. What's the better?
,
6.3"
IPS
IPS
1080x2340
48
MP
MP
25mp
6GB
RAM
RAM
Octa-core
3905
mAh
mAh
(Removable)
vs
3.5"
LED
LED
480x854
5
MP
MP
0.3mp
512MB
RAM
RAM
Dual-core
1320
mAh
mAh
(Removable)
What's the better phone? Fairphone 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!
32 Advantages 
4 Advantages | 18 Common items in both devices |
| Plastic body, glass front |
| 60Hz |
| 16 million |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| Capacitive |
| Multitouch |
| +11 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 | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Model | Fairphone 4 (128GB) | Xperia U (ST25i) |
| Other model names | Fairphone 4 (6GB RAM) | Sony Xperia U ST25, Sony Kumquat |
| Country or region available |  (Europe) |  (Global, International) |
| Brand | Fairphone | Sony |
| Release date | 10/25/2021, Announced: 9/30/2021 | 5/7/2012, Announced: 2/1/2012 |
| Depth | 10.5 millimeters (0.41 inches) | 12 millimeters (0.47 inches) |
| Size (width x height) | 75.5 x 162 millimeters (2.97 x 6.38 in) | 54 x 112 millimeters (2.13 x 4.41 in) |
| Weight | 225 grams (7.88 ounces) | 110 grams (3.85 ounces) |
| Build, materials | Plastic body, glass front | Plastic body, glass front |
| Protection against water and others | IP54 certified: protection against dust and splashing. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | Not supported |
📲 Display | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Display type | TFT IPS LCD | TFT LED-Backlit LCD |
| Screen size | 6.3" inches | 3.5" inches |
| Screen-to-body ratio | ~79.7% (screen-to-body ratio) | ~55.8% (screen-to-body ratio) |
| Display resolution | 1080x2340 pixels (19.5:9) | 480x854 pixels (16:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 4-points |
| Pixel density (dot pitch) | 409 PPI | 280 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 5 | Scratch-resistant glass |
| Refresh rate | 60Hz | 60Hz |
| Display features | Not supported | Not supported |
🤖 Operating System | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| System version | Android 11 | Android 2.3.7 Gingerbread |
| Firmware update | Android 13 | Android 4.0.4 Ice Cream Sandwich ICS |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Chipset | 64bit: Qualcomm Snapdragon 750G (SM7225) (8nm) | 32bit: ST-Ericsson NovaThor U8500 (45nm) |
| CPU | Octa-core, 2 processors: 2x 2.2GHz Kryo 570 (Dual-core) 6x 1.8GHz Kryo 570 (Hexa-core) | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A9 (Dual-core) |
| GPU graphical controller | Qualcomm Adreno 619 (800MHz) | ARM Mali-400 MP1 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| RAM memory | 6GB LPDDR4X | 512MB LPDDR2 |
| Internal storage | 128GB (104GB available) UFS 2.1 | 8GB (4GB available) |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| 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) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 3000/1024 Mbps | 14.4/5.76 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G |
| 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 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 900/2100 |
| Primary 4G network | LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 18, 19, 20, 28, 32, 71) TD-LTE (38, 40, 41) VoLTE | Not supported |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 41, 71, 77, 78) | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 | GPRS, EDGE, UMTS, HSDPA, HSUPA |
| 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 Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 18, 19, 20, 28, 32, 71) TD-LTE (38, 40, 41) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6 | Not supported |
📷 Camera | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Back camera (main camera) | (dual camera) 48 megapixels 48MP ultrawide f/2.21/2"0.8µmPDAF+TOF3D | 5 megapixels |
| Main camera resolution | 8000x6000 pixels | 2592x1944 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | HD (1280x720) 30 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/1.6 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/2" inches | feature not registered |
| Pixel size | 0.8µm pixel | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Not supported |
| HDR | HDR photo on both cameras | Not supported |
| Camera extras | 4K@30fps 1080p@30/60fps | feature not registered |
📸 Front camera | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Front camera (secondary) | 25 megapixels | 0.3 megapixels |
| Front camera resolution | 5760x4320 pixels | 640x480 pixels |
| Video recording (secondary) | Full HD (1920x1080) | VGA (640x480) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/2.78" inches | feature not registered |
| Pixel size | 0.9µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Loudspeaker | Mono sound (not stereo) | Supported |
| Active noise cancellation | 2 microphones | 2 microphones or more |
| Radio | Not supported | FM (RDS) |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.263, H.264, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, eAAC+, WMA, WAV |
🔌 Connectivity | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| USB | USB 3.1 Type-C, USB OTG On-The-Go | MicroUSB 2.0, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | 3.5mm jack |
| TV output | USB Type-C SlimPort® | Not supported |
| Bluetooth | 5.1 + A2DP/LE | 2.1 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (side-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| Battery type | LiPo: li-ion polymer (Removable) | Li-Ion: lithium-ion (Removable) BA600 |
| Battery capacity | 3905 mAh | 1320 mAh |
| Charger, watts | 20W Wired fast charging | Wired charging |
| Inductive / wireless charging | Not supported | Not supported |
| Talk time autonomy | feature not registered | 5.6 hours |
| Standby | feature not registered | 472 hours (19.7 days) |
➕ Other features | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| 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, Flash player |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Gray, Green, Speckled Green • Modular phone with swappable components • iFixit: 10/10 | • Colors: Black, White • Exchangeable bottom caps: White, Black, Pink, Yellow • Sony Reality Display • Sony Mobile BRAVIA Engine • xLoud • 3D surround sound • WiFi hotspot • Java framework |
☢️ Radiation rate | ||
| Fairphone 4 (128GB) | Sony Xperia U (ST25i) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 1.09W/kg (head), 0.93W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | 0.49W/kg (head), 0.99W/kg (body) | 1.62W/kg (head) |