Fairphone 6 vs Sony Xperia U (ST25i)
Side by side comparison between Fairphone 6 vs Sony Xperia U phones, differences, pros, cons and full specifications. What's the better?
,
6.31"
OLED
OLED
1116x2484
50
MP
MP
32mp
8GB
RAM
RAM
Octa-core
4415
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 6
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!
35 Advantages 
4 Advantages | 16 Common items in both devices |
| Only digital zoom |
| PDAF on back camera and autofocus front camera / Autofocus |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| Compass |
| +9 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 6 | Sony Xperia U (ST25i) | |
| Change model | ||
| Model | Fairphone 6 | Xperia U (ST25i) |
| Other model names | Fairphone (Gen. 6) | Sony Xperia U ST25, Sony Kumquat |
| Country or region available |   (Europe), (Global, International) | (Global, International) |
| Brand | Fairphone | Sony |
| Release date | 6/25/2025 | 5/7/2012, Announced: 2/1/2012 |
| Depth | 9.6 millimeters (0.38 inches) | 12 millimeters (0.47 inches) |
| Size (width x height) | 73.3 x 156.5 millimeters (2.89 x 6.16 in) | 54 x 112 millimeters (2.13 x 4.41 in) |
| Weight | 193 grams (6.76 ounces) | 110 grams (3.85 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | Plastic body, glass front |
| Protection against water and others | IP55 certified: dust resistant and protection from short-term exposure to water jets MIL-STD-810H military certified: rigorous testing for salt, dust, humidity, rain, vibration, solar radiation, drop and thermal shock resistance. | Not supported |
📲 Display | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Display type | LTPO OLED | TFT LED-Backlit LCD |
| Screen size | 6.31" inches | 3.5" inches |
| Screen-to-body ratio | ~83.7% (screen-to-body ratio) | ~55.8% (screen-to-body ratio) |
| Display resolution | 1116x2484 pixels (20:9) | 480x854 pixels (16:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 4-points |
| Pixel density (dot pitch) | 432 PPI | 280 PPI |
| Colors | 1 billion | 16 million |
| Scratch-resistant glass | Gorilla Glass 7i | Scratch-resistant glass |
| Refresh rate | 120Hz | 60Hz |
| Display features | 880nits[typ], 1400nits[peak] | Not supported |
🤖 Operating System | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| System version | Android 15 | Android 2.3.7 Gingerbread |
| Firmware update | Android 16 | Android 4.0.4 Ice Cream Sandwich ICS |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Chipset | 64bit: Qualcomm Snapdragon 7s Gen 3 (SM7635) (4nm) | 32bit: ST-Ericsson NovaThor U8500 (45nm) |
| CPU | Octa-core, 3 processors: 1x 2.5GHz ARM Cortex-A720 (Single-core) 3x 2.4GHz ARM Cortex-A720 (Triple-core) 4x 1.8GHz ARM Cortex-A520 (Quad-core) | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A9 (Dual-core) |
| GPU graphical controller | Qualcomm Adreno 810 (1GHz) | ARM Mali-400 MP1 |
| Performance (benchmark) | AnTuTu: 786958 (v10) | feature not registered |
💽 Memory and storage | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| RAM memory | 8GB LPDDR5 | 512MB LPDDR2 |
| Internal storage | 256GB (220GB available) UFS 3.1 | 8GB (4GB available) |
| External storage | Until 2TB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (dedicated slot) | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM | 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 Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 25, 26, 28, 32, 66, 71) TD-LTE (38, 40, 41, 42) VoLTE | Not supported |
| Primary 5G network | SA/NSA/Sub6 (1, 2, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 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 | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
📷 Camera | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Back camera (main camera) | (triple camera) 50 megapixels 13MP ultrawide f/2.21/3.06"1.12μmPDAF 0.3MP depth TOF-3D | 5 megapixels |
| Main camera resolution | 8160x6120 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 | 1/1.56" inches | feature not registered |
| Pixel size | 1µm pixel | feature not registered |
| Autofocus | PDAF on back camera and autofocus front camera | 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@30/60/120fps 720p@240fps Sony Lytia 700C Samsung KD1 | feature not registered |
📸 Front camera | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Front camera (secondary) | 32 megapixels | 0.3 megapixels |
| Front camera resolution | 6528x4896 pixels | 640x480 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | VGA (640x480) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3.42" inches | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Loudspeaker | Stereo sound | 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 6 | Sony Xperia U (ST25i) | |
| USB | USB 2.0 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 (reversible) | Not supported |
| Bluetooth | 5.4 + A2DP/LE | 2.1 + A2DP |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6E/6] (2.4GHz, 5GHz, 6GHz) + 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 6 | Sony Xperia U (ST25i) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Fairphone 6 | Sony Xperia U (ST25i) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Removable) BA600 |
| Battery capacity | 4415 mAh | 1320 mAh |
| Charger, watts | 30W 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 6 | 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: Horizon Black, Cloud White, Forest Green 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 6 | 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), 1.39W/kg (body) | 1.62W/kg (head) |