Samsung Galaxy S21 Ultra (SM-G998B 128GB) vs Xiaomi Poco F3 (256GB)
Side by side comparison between Samsung Galaxy S21 Ultra vs Xiaomi Poco F3 phones, differences, pros, cons and full specifications. What's the better?
,
6.8"
AMOLED
AMOLED
1440x3200
108
MP
MP
40mp
12GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
vs
6.67"
AMOLED
AMOLED
1080x2400
48
MP
MP
20mp
8GB
RAM
RAM
Octa-core
4520
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B 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!
27 Common items in both devices |
UFS 3.1 |
Aluminum frame, glass front/back |
HDR10+ |
120Hz |
16 million |
LED flash |
PDAF: phase detection autofocus on both cameras / PDAF: phase detection autofocus |
+20 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 | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Model | Galaxy S21 Ultra (SM-G998B 128GB) | Poco F3 (256GB) |
Other model names | Galaxy S21 Ultra 5G (SM-G998B Single-SIM) | POCO F3 5G (256GB + 8GB RAM) M2012K11AG |
Country or region available | Australia | (Global, International) |
Brand | Samsung | Xiaomi |
Release date | 1/29/2021, Announced: 1/14/2021 | 3/27/2021, Announced: 3/22/2021 |
Depth | 8.9 millimeters (0.35 inches) | 7.8 millimeters (0.31 inches) |
Size (width x height) | 75.6 x 165.1 millimeters (2.98 x 6.5 in) | 76.4 x 163.7 millimeters (3.01 x 6.44 in) |
Weight | 227 grams (7.95 ounces) | 196 grams (6.86 ounces) |
Build, materials | Aluminum frame, glass front/back | Aluminum frame, glass front/back |
Protection against water and others | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant | Not supported |
📲 Display | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Display type | Dynamic AMOLED | AMOLED |
Screen size | 6.8" inches | 6.67" inches |
Screen-to-body ratio | ~89.4% (screen-to-body ratio) | ~85.9% (screen-to-body ratio) |
Display resolution | 1440x3200 pixels (20:9) | 1080x2400 pixels (20:9) |
Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
Pixel density (dot pitch) | 516 PPI | 395 PPI |
Colors | 16 million | 16 million |
Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass 5 |
Refresh rate | 120Hz | 120Hz |
Display features | 1500nits[peak] HDR10+ Always-On Display | 1300nits[peak] HDR10+ |
🤖 Operating System | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
System version | Android 11 | Android 11 |
Firmware update | Android 14 | feature not registered |
User Interface | One UI 3.1 / 4.1 / 5.1 / 6.0 | MIUI 12 |
⚙️ Processor | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Chipset | 64bit: Samsung Exynos 2100 (5nm) | 64bit: Qualcomm Snapdragon 870 (SM8250-AC) (7nm) |
CPU | 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) | Octa-core, 3 processors: 1x 3.2GHz Kryo 585 (Single-core) 3x 2.42GHz Kryo 585 (Triple-core) 4x 1.8GHz Kryo 585 (Quad-core) |
GPU graphical controller | ARM Mali-G78 MP14 (854MHz) | Qualcomm Adreno 650 (670MHz) |
Performance (benchmark) | AnTuTu: 657150 (v8), 727634 (v9) Geekbench: 3457 (v5.2) GFXBench: 51fps (ES 3.1 onscreen) | AnTuTu: 631850 (v8), 568380 (v9) |
💽 Memory and storage | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
RAM memory | 12GB LPDDR5 | 8GB LPDDR5 |
Internal storage | 128GB (101GB available) UFS 3.1 | 256GB (230GB available) UFS 3.1 |
External storage | Not supported | Not supported |
📶 Mobile networks | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card |
SIM card | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM | 2 slots (Dual-SIM) nano-SIM (4FF) |
Maximum Download / Upload | 5000/1920 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 | GSM 850/900/1800/1900 |
Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
Primary 4G network | 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 | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 66) TD-LTE (38, 40, 41) VoLTE |
Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78) | SA/NSA (1, 3, 5, 7, 8, 20, 28, 38, 41, 77, 78) |
Primary 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 |
Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
Secondary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
Secondary 4G network | 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 | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 66) TD-LTE (38, 40, 41) 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 |
📷 Camera | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Back camera (main camera) | (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 | (triple camera) 48 megapixels 8MP ultrawide f/2.2119° 5MP macro f/2.450mm1/5.0"1.12µmAF |
Main camera resolution | 12000x9000 pixels | 8000x6000 pixels |
Video recording (primary) | 8K UHD (7680x4320) 24 fps | 2K UHD (3840x2130) 30 fps |
Flash | LED flash | LED flash |
Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
Focal length | 26mm lens | 26mm lens |
Sensor size | 1/1.33" inches | 1/2" inches |
Pixel size | 1.8µm pixel | 0.8µm pixel |
Autofocus | PDAF: phase detection autofocus on both cameras | PDAF: phase detection autofocus |
Touch focus | Supported | Supported |
Image stabilization | OIS: Optical stabilization | EIS: Digital 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 on both cameras |
Camera extras | 4K@60fps 1080p@240fps 720p@960fps | 1080p@960fps 720p@120fps |
📸 Front camera | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Front camera (secondary) | 40 megapixels | 20 megapixels |
Front camera resolution | 7296x5472 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/2.5 (aperture) |
Focal length | 26mm lens | feature not registered |
Sensor size | 1/2.8" inches | 1/3.4" inches |
Pixel size | 0.7µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Stereo sound with dual speakers 24-bit/192kHz |
Active noise cancellation | 2 microphones or more | 2 microphones or more |
Radio | FM | FM |
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 | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
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 | 5.2 + A2DP/LE | 5.1 + 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 [wifi6] (2.4GHz, 5GHz) + 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 | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor UWB (Ultra Wideband) | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (side-mounted) Gyroscope Virtual proximity sensor |
Vibrating alert | Supported | Supported |
🔋 Battery | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
Battery capacity | 5000 mAh | 4520 mAh |
Charger, watts | 25W Wired fast charging USB Power Delivery 3.0 | 33W Wired fast charging Quick Charge 3+ USB Power Delivery 3.0 |
Inductive / wireless charging | 15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging | Not supported |
Talk time autonomy | feature not registered | feature not registered |
Standby | feature not registered | feature not registered |
➕ Other features | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
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: Phantom Black, Silver, Titanium, Navy, Brown • Samsung Pay (Visa, MasterCard) • Samsung DeX • Stylus pen support | • Colors: Night black, Arctic white, Deep ocean blue |
☢️ Radiation rate | ||
Galaxy S21 Ultra (SM-G998B 128GB) | Xiaomi Poco F3 (256GB) | |
SAR 1.6W/kg (USA, Mexico, etc.) | 0.24W/kg (head), 0.72W/kg (body) | feature not registered |
SAR 2W/kg (Europe, UK, etc.) | 0.714W/kg (head), 1.58W/kg (body) | feature not registered |