LG K51 (K500UMT3) vs OnePlus 9 Pro (256GB/8GB)
Side by side comparison between LG K51 vs OnePlus 9 Pro phones, differences, pros, cons and full specifications. What's the better?
,
6.5"
IPS
IPS
720x1560
13
MP
MP
13mp
3GB
RAM
RAM
Octa-core
4000
mAh
mAh
(Non removable)
vs
6.7"
AMOLED
AMOLED
1440x3216
48
MP
MP
16mp
8GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
What's the better phone? OnePlus 9 Pro (256GB/8GB)
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!
4 Advantages 
32 Advantages | 17 Common items in both devices |
| Only digital zoom |
| PDAF: phase detection autofocus / LDAF/PDAF: laser/phase detection autofocus |
| HDR photo on both cameras / HDR photo/video on both cameras |
| f/1.8 (aperture) |
| (front) Full HD (1920x1080) |
| Capacitive |
| Multitouch |
| +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 | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Model | K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) |
| Other model names | LG K51 (T-Mobile) LMK500UMT3ATMOTN, LM-K500UMT3 | OnePlus 9 Pro LE2123 (Global), LE2121 (India), LE2120(China) |
| Country or region available |  USA |  China |
| Brand | LG | OnePlus |
| Release date | 5/1/2020 | 3/30/2021, Announced: 3/23/2021 |
| Depth | 8.47 millimeters (0.33 inches) | 8.7 millimeters (0.34 inches) |
| Size (width x height) | 77.92 x 166.96 millimeters (3.07 x 6.57 in) | 73.6 x 163.2 millimeters (2.9 x 6.43 in) |
| Weight | 204 grams (7.14 ounces) | 197 grams (6.9 ounces) |
| Build, materials | Plastic body, glass front | Aluminum frame, glass front/back |
| Protection against water and others | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Display type | TFT IPS LCD | Fluid AMOLED |
| Screen size | 6.5" inches | 6.7" inches |
| Screen-to-body ratio | ~79.7% (screen-to-body ratio) | ~89.9% (screen-to-body ratio) |
| Display resolution | 720x1560 pixels (19.5:9) | 1440x3216 pixels (20:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 264 PPI | 526 PPI |
| Colors | 16 million | 1 billion |
| Scratch-resistant glass | Panda King Glass | Gorilla Glass 5 |
| Refresh rate | 60Hz | 120Hz |
| Display features | Not supported | 1300nits[peak] HDR10+ Always-On Display |
🤖 Operating System | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| System version | Android 10 | Android 11 |
| Firmware update | feature not registered | Android 13 |
| User Interface | feature not registered | OxygenOS 12 / 13 (Global) ColorOS 12 / 13 (China) |
⚙️ Processor | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Chipset | 64bit: MediaTek Helio P22 (MT6762) (12nm) | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) |
| CPU | Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core) | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) |
| GPU graphical controller | PowerVR GE8320 (650MHz) | Qualcomm Adreno 660 (840MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| RAM memory | 3GB LPDDR3 | 8GB LPDDR5 |
| Internal storage | 32GB (18GB available) eMMC 5.1 | 256GB (220GB available) UFS 3.1 |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 300/50 Mbps | 2000/1024 Mbps |
| Network technology | 2G, 3G, 4G | 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 | CDMA 800 (China), GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1900/2100 | CDMA2000 1xEV-DO (China) UMTS 800/850/900/1700/1800/1900/2100 |
| Primary 4G network | LTE Cat6 (1, 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 66, 71) TD-LTE (38, 41) | LTE Cat20 VoLTE Global: LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) India: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26) TD-LTE (34, 38, 39, 40, 41, 46) China: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26) TD-LTE (34, 38, 39, 40, 41) |
| Primary 5G network | Not supported | SA/NSA Global: (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 78) India: (41, 78) China: (1, 3, 28, 41, 78, 79) |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, 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 800/850/900/1700/1800/1900/2100 |
| Secondary 4G network | Not supported | LTE Cat20 VoLTE Global: LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66) TD-LTE (38, 39, 40, 41) India: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26) TD-LTE (34, 38, 39, 40, 41, 46) China: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26) TD-LTE (34, 38, 39, 40, 41) |
| Secondary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Back camera (main camera) | (triple camera) 13 megapixels 5MP ultrawide f/2.21.12μm1/5"115° 2MP depth f/2.41.75μm1/5"85° | (quad camera) 48 megapixels 8MP telephoto f/2.477mm1.0µmPDAFOIS3.3x-optical-zoom 50MP ultrawide f/2.214mm1/1.56"1.0µmAF 2MP monochrome f/2.4 |
| Main camera resolution | 4128x3096 pixels | 8000x6000 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | 8K UHD (7680x4320) 30 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
| Focal length | 26mm lens | 23mm lens |
| Sensor size | 1/3" inches | 1/1.43" inches |
| Pixel size | 1.12µm pixel | 1.12µm pixel |
| Autofocus | PDAF: phase detection autofocus | LDAF/PDAF: laser/phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | OIS: Optical stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Supported |
| HDR | HDR photo on both cameras | HDR photo/video on both cameras |
| Camera extras | feature not registered | 4K@30/60/120fps 1080p@30/60/240fps Hasselblad Color Calibration Sony IMX689, IMX766. IMX471 sensor |
📸 Front camera | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Front camera (secondary) | 13 megapixels | 16 megapixels |
| Front camera resolution | 4128x3096 pixels | 4608x3456 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.4 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | 1/3.06" inches |
| Pixel size | 1.12µm pixel | 1µm pixel |
🔉 Sound and multimedia | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Loudspeaker | Supported | Stereo sound with dual speakers 24-bit/192kHz Dolby Atmos |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | 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 | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | USB 3.1 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 | 5.0 + A2DP/LE | 5.2 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, SBAS |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4000 mAh | 4500 mAh |
| Charger, watts | 10W (5V/2A) Wired charging | 65W (10V/6.5A) Wired fast charging USB Power Delivery 1.0 |
| Inductive / wireless charging | Not supported | 50W Qi Wireless charging (Qi/WPC) |
| Talk time autonomy | 21 hours | feature not registered |
| Standby | 576 hours (24 days) | feature not registered |
➕ Other features | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| Call control | Voice dialing, Voice recorder | 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: Titan gray • Google Assistant • DTS:X 3D sound surround • HAC M3/T3 | • Colors: Stellar Black, Morning Mist, Pine Green |
☢️ Radiation rate | ||
| LG K51 (K500UMT3) | OnePlus 9 Pro (256GB/8GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |