Samsung Galaxy S21 Ultra (SM-G998B/DS 512GB) vs LG G8 ThinQ (G820UMB)
Side by side comparison between Samsung Galaxy S21 Ultra vs LG G8 ThinQ phones, differences, pros, cons and full specifications. What's the better?
,
6.8"
AMOLED
AMOLED
1440x3200
108
MP
MP
40mp
16GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
vs
6.1"
POLED
POLED
1440x3120
12
MP
MP
8mp
6GB
RAM
RAM
Octa-core
3500
mAh
mAh
(Non removable)
What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B/DS 512GB)
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 Advantages 
7 Advantages | 23 Common items in both devices |
| Aluminum frame, glass front/back |
| 16 million |
| LED flash |
| PDAF: phase detection autofocus on both cameras / PDAF on back camera and autofocus front camera |
| OIS: Optical stabilization |
| HDR photo/video on both cameras / HDR photo/video and HDR photo on front camera |
| Capacitive |
| +16 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/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Model | Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) |
| Other model names | Galaxy S21 Ultra 5G (SM-G998B/Dual-SIM) | Verizon LG G8 ThinQ LMG820UMB, LM-G820UMB |
| Country or region available |  (Global, International) |  USA |
| Brand | Samsung | LG |
| Release date | 1/29/2021, Announced: 1/14/2021 | 4/11/2019, Announced: 2/24/2019 |
| Depth | 8.9 millimeters (0.35 inches) | 8.4 millimeters (0.33 inches) |
| Size (width x height) | 75.6 x 165.1 millimeters (2.98 x 6.5 in) | 71.882 x 151.892 millimeters (2.83 x 5.98 in) |
| Weight | 227 grams (7.95 ounces) | 167 grams (5.85 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 | IP68 certified: dust/waterproof over 1.5 meters and 30min. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Display type | Dynamic AMOLED | P-OLED |
| Screen size | 6.8" inches | 6.1" inches |
| Screen-to-body ratio | ~89.4% (screen-to-body ratio) | ~83.7% (screen-to-body ratio) |
| Display resolution | 1440x3200 pixels (20:9) | 1440x3120 pixels (19.5:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 516 PPI | 563 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass 5 |
| Refresh rate | 120Hz | 60Hz |
| Display features | 1500nits[peak] HDR10+ Always-On Display | HDR10 100% DCI-P3 Always-On Display |
🤖 Operating System | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| System version | Android 11 | Android 9.0 Pie |
| Firmware update | Android 14 | Android 12 |
| User Interface | One UI 3.1 / 4.1 / 5.1 / 6.0 | LG UX 8.0 / 9.0 / 10 / 11 |
⚙️ Processor | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Chipset | 64bit: Samsung Exynos 2100 (5nm) | 64bit: Qualcomm Snapdragon 855 (SM8150) (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 2.84GHz Kryo 485 (Single-core) 3x 2.42GHz Kryo 485 (Triple-core) 4x 1.78GHz Kryo 485 (Quad-core) |
| GPU graphical controller | ARM Mali-G78 MP14 (854MHz) | Qualcomm Adreno 640 (585MHz) |
| Performance (benchmark) | AnTuTu: 657150 (v8), 727634 (v9) Geekbench: 3457 (v5.2) GFXBench: 51fps (ES 3.1 onscreen) | AnTuTu: 331537 (v7), 362730 (v8) Geekbench: 10735 (v4.4), 2700 (v5.1) GFXBench: 20fps (ES 3.1 onscreen) |
💽 Memory and storage | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| RAM memory | 16GB LPDDR5 | 6GB LPDDR4X |
| Internal storage | 512GB (457GB available) UFS 3.1 | 128GB (104GB available) UFS 2.1 |
| External storage | Not supported | Until 1TB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 5000/1920 Mbps | 1600/150 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G |
| 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 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO UMTS 850/900/1900/2100 |
| 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 Cat19 (2, 3, 4, 5, 7, 13, 20, 28, 66) TD-LTE (46, 48) |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78) | Not supported |
| 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 |
| 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 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 | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | Not supported |
📷 Camera | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| 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 | (dual camera) 12 megapixels 16MP ultrawide f/1.91/3.1"16mm1.0µmFF |
| Main camera resolution | 12000x9000 pixels | 4000x3000 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 24 fps | 4K UHD (3840x2160) 60 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.5 (aperture) |
| Focal length | 26mm lens | 27mm lens |
| Sensor size | 1/1.33" inches | 1/2.6" inches |
| Pixel size | 1.8µm pixel | 1.4µm pixel |
| Autofocus | PDAF: phase detection autofocus on both cameras | PDAF on back camera and autofocus front camera |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | OIS: Optical 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/video and HDR photo on front camera |
| Camera extras | 4K@60fps 1080p@240fps 720p@960fps | 1080p@30/60fps 720p@240fps |
📸 Front camera | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Front camera (secondary) | 40 megapixels | (dual front camera) 8 megapixels 0.3MP TOF f/1.4 |
| Front camera resolution | 7296x5472 pixels | 3264x2448 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/1.7 (aperture) |
| Focal length | 26mm lens | 26mm lens |
| Sensor size | 1/2.8" inches | 1/3.6" inches |
| Pixel size | 0.7µm pixel | 1.22µm pixel |
🔉 Sound and multimedia | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Mono sound (not stereo) 32-bit/192kHz DTS:X |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM | 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 | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | USB 3.1 Type-C, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | 3.5mm jack |
| TV output | USB Type-C (reversible) | USB Type-C (reversible) |
| Bluetooth | 5.2 + A2DP/LE | 5.0 + 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 [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| 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 Barometer Compass Face unlock Fingerprint sensor (rear-mounted) Gesture Gyroscope Hall effect Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 5000 mAh | 3500 mAh |
| Charger, watts | 25W Wired fast charging USB Power Delivery 3.0 | 21W Wired fast charging Quick Charge 3 USB Power Delivery 2.0 |
| Inductive / wireless charging | 15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging | 9W Qi wireless charging |
| Talk time autonomy | feature not registered | 22 hours |
| Standby | feature not registered | 412 hours (17.2 days) |
➕ Other features | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| 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: Aurora Black, Platinum Gray |
☢️ Radiation rate | ||
| Galaxy S21 Ultra (SM-G998B/DS 512GB) | LG G8 ThinQ (G820UMB) | |
| 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 |