Sony Xperia U (ST25a) vs Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB)
Side by side comparison between Sony Xperia U vs Samsung Galaxy S21 Ultra phones, differences, pros, cons and full specifications. What's the better?
,
3.5"
LED
LED
480x854
5
MP
MP
0.3mp
512MB
RAM
RAM
Dual-core
1320
mAh
mAh
(Removable)
vs
6.8"
AMOLED
AMOLED
1440x3200
108
MP
MP
40mp
12GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B/DS 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!
17 Common items in both devices |
16 million |
LED flash |
Autofocus / PDAF: phase detection autofocus on both cameras |
Capacitive |
Multitouch |
Accelerometer |
Ambient light sensor |
+10 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 | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Model | Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) |
Other model names | Sony Xperia U ST25, Sony Kumquat | Galaxy S21 Ultra 5G (SM-G998B/Dual-SIM) |
Country or region available | ![]() ![]() ![]() ![]() (Latin America), Brazil, Canada, USA | ![]() (Global, International) |
Brand | Sony | Samsung |
Release date | 5/7/2012 | 1/29/2021, Announced: 1/14/2021 |
Depth | 12 millimeters (0.47 inches) | 8.9 millimeters (0.35 inches) |
Size (width x height) | 54 x 112 millimeters (2.13 x 4.41 in) | 75.6 x 165.1 millimeters (2.98 x 6.5 in) |
Weight | 110 grams (3.85 ounces) | 227 grams (7.95 ounces) |
Build, materials | Plastic body, glass front | Aluminum frame, glass front/back |
Protection against water and others | Not supported | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Display type | TFT LED-Backlit LCD | Dynamic AMOLED |
Screen size | 3.5" inches | 6.8" inches |
Screen-to-body ratio | ~55.8% (screen-to-body ratio) | ~89.4% (screen-to-body ratio) |
Display resolution | 480x854 pixels (16:9) | 1440x3200 pixels (20:9) |
Touchscreen | Capacitive Multitouch 4-points | Capacitive Multitouch 10-points |
Pixel density (dot pitch) | 280 PPI | 516 PPI |
Colors | 16 million | 16 million |
Scratch-resistant glass | Scratch-resistant glass | Gorilla Glass Victus |
Refresh rate | 60Hz | 120Hz |
Display features | Not supported | 1500nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
System version | Android 2.3.7 Gingerbread | Android 11 |
Firmware update | Android 4.0.4 Ice Cream Sandwich ICS | Android 15 |
User Interface | feature not registered | One UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0 |
⚙️ Processor | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Chipset | 32bit: ST-Ericsson NovaThor U8500 (45nm) | 64bit: Samsung Exynos 2100 (5nm) |
CPU | Dual-core, 1 processor: 2x 1GHz ARM Cortex-A9 (Dual-core) | Octa-core, 3 processors: 1x 2.9GHz ARM Cortex-X1 (Single-core) 3x 2.8GHz ARM Cortex-A78 (Triple-core) 4x 2.2GHz ARM Cortex-A55 (Quad-core) |
GPU graphical controller | ARM Mali-400 MP1 | ARM Mali-G78 MP14 (854MHz) |
Performance (benchmark) | feature not registered | AnTuTu: 657150 (v8), 727634 (v9) Geekbench: 3457 (v5.2) GFXBench: 51fps (ES 3.1 onscreen) |
💽 Memory and storage | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
RAM memory | 512MB LPDDR2 | 12GB LPDDR5 |
Internal storage | 8GB (4GB available) | 128GB (101GB available) UFS 3.1 |
External storage | Not supported | Not supported |
📶 Mobile networks | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card |
SIM card | 1 slot (Single-SIM) Standard mini-SIM (2FF) | 2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM |
Maximum Download / Upload | 14.4/5.76 Mbps | 5000/1920 Mbps |
Network technology | 2G, 3G | 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 | GSM 850/900/1800/1900 |
Primary 3G network | UMTS 850/1900/2100 | UMTS 850/900/1700/1900/2100 |
Primary 4G network | Not supported | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) VoLTE |
Primary 5G network | Not supported | SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78) |
Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
Secondary 3G network | Not supported | UMTS 850/900/1700/1900/2100 |
Secondary 4G network | Not supported | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) VoLTE |
Secondary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Back camera (main camera) | 5 megapixels | (quad camera) 108 megapixels 10MP periscope telephoto f/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom 10MP telephoto f/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom 12MP ultrawide f/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video |
Main camera resolution | 2592x1944 pixels | 12000x9000 pixels |
Video recording (primary) | HD (1280x720) 30 fps | 8K UHD (7680x4320) 24 fps |
Flash | LED flash | LED flash |
Focal aperture | feature not registered | f/1.8 (aperture) |
Focal length | feature not registered | 26mm (lens) |
Sensor size | feature not registered | 1/1.33" inches |
Pixel size | feature not registered | 1.8µm pixel |
Autofocus | Autofocus | PDAF: phase detection autofocus on both cameras |
Touch focus | Supported | Supported |
Image stabilization | EIS: Digital stabilization | OIS: Optical stabilization |
Zoom | Only digital zoom | Digital and optical zoom |
Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
BSI sensor | Not supported | Supported |
HDR | Not supported | HDR photo/video on both cameras |
Camera extras | feature not registered | 4K@60fps 1080p@240fps 720p@960fps |
📸 Front camera | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Front camera (secondary) | 0.3 megapixels | 40 megapixels |
Front camera resolution | 640x480 pixels | 7296x5472 pixels |
Video recording (secondary) | VGA (640x480) | 4K UHD (3840x2160) |
Front flash | Not supported | Not supported |
Focal aperture | feature not registered | f/2.2 (aperture) |
Focal length | feature not registered | 26mm (lens) |
Sensor size | feature not registered | 1/2.8" inches |
Pixel size | feature not registered | 0.7µm pixel |
🔉 Sound and multimedia | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Loudspeaker | Supported | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG |
Active noise cancellation | 2 microphones or more | 3 microphones |
Radio | FM (RDS) | FM |
TV | Not supported | Not supported |
Video formats | MP4, H.263, H.264, WMV | MP4, H.265, H.264, H.263, XviD, MKV |
Audio formats | MP3, eAAC+, WMA, WAV | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
USB | MicroUSB 2.0, USB OTG On-The-Go | USB 3.2 Type-C, USB OTG On-The-Go |
Audio output | 3.5mm jack | Type-C reversible connector |
TV output | Not supported | USB Type-C (reversible) |
Bluetooth | 2.1 + A2DP | 5.2 + A2DP/LE |
WiFi | 802.11 b/g/n [wifi4] (2.4GHz) | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
DLNA | Supported | Supported |
GPS | A-GPS, GeoTagging | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
NFC | Not supported | Supported |
Infrared port | Not supported | Not supported |
🧭 Sensors | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Sensors | Accelerometer Ambient light sensor Compass Proximity sensor | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband) |
Vibrating alert | Supported | Supported |
🔋 Battery | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
Battery type | Li-Ion: lithium-ion (Removable) BA600 | LiPo: li-ion polymer (Non removable) |
Battery capacity | 1320 mAh | 5000 mAh |
Charger, watts | Wired charging | 25W Wired fast charging USB Power Delivery 3.0 |
Inductive / wireless charging | Not supported | 15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging |
Talk time autonomy | 5.6 hours | feature not registered |
Standby | 472 hours (19.7 days) | feature not registered |
➕ Other features | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 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, Flash player | HTML, XHTML, HTML5 |
Antenna | Internal antenna | Internal antenna |
Qwerty physical keyboard | Not supported | Not supported |
Miscellaneous | • 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 | • Colors: Phantom Black, Silver, Titanium, Navy, Brown • Samsung Pay (Visa, MasterCard) • Samsung DeX • Stylus pen support |
☢️ Radiation rate | ||
Sony Xperia U (ST25a) | Galaxy S21 Ultra (SM-G998B/DS 128GB) | |
SAR 1.6W/kg (USA, Mexico, etc.) | 1.09W/kg (head), 0.93W/kg (body) | 0.24W/kg (head), 0.72W/kg (body) |
SAR 2W/kg (Europe, UK, etc.) | 1.62W/kg (head) | 0.714W/kg (head), 1.58W/kg (body) |