| Physical features | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Model | K8 Note (32GB) | K51 (K500UM3) |
| Other model names | Lenovo K8 Note XT1902-3 3GB RAM, M2CB2 | LG K51 (Boost Mobile) LMK500UM3ABMUTN, LM-K500UM3 |
| Country or region available | 
(Global, International) | 
USA |
| Brand | Lenovo | LG |
| Release date | August, 2017 | February, 2020 |
| Depth | 8.5 millimeters (0.33 inches) | 8.47 millimeters (0.33 inches) |
| Size (width x height) | 75.9 x 154.5 millimeters (2.99 x 6.08 in) | 77.92 x 166.96 millimeters (3.07 x 6.57 in) |
| Weight | 180 grams (6.3 ounces) | 204 grams (7.14 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | feature not registered | Plastic body, glass front |
| Protection against water and others | Water splash resistant (don't immerse) | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
| System (OS) | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Operating system | Android 7.1.1 Nougat | Android 9.0 Pie |
| Firmware update | Android 8.0 Oreo | feature not registered |
| Hardware | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Chipset | 64bit - MediaTek MT6797D Helio X23 (20nm) | 64bit - MediaTek MT6762 Helio P22 (12nm) |
| CPU processor | Deca-Core, 3 processors:
2.3Ghz Dual-Core ARM Cortex-A72
1.85Ghz Quad-Core ARM Cortex-A53
1.4Ghz Quad-Core ARM Cortex-A53 | Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A53
1.5Ghz Quad-Core ARM Cortex-A53 |
| GPU graphical controller | ARM Mali-T880 MP4 800Mhz | PowerVR GE8320 650Mhz |
| RAM memory | 3GB LPDDR3 | 3GB LPDDR3 |
| Internal storage | 32GB (22GB available) | 32GB (16GB available)
eMMC 5.1 |
| External storage | Until 256GB microSD, microSDXC
(dedicated slot) | Until 1TB microSD, microSDXC
(dedicated slot) |
| Display | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 5.5" inches | 6.5" inches |
| Screen-to-body ratio | ~71.1% (screen-to-body ratio) | ~79.7% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 720x1560 pixels (19.5:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 401 PPI | 264 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 3 | Panda King Glass |
| Display features | feature not registered | 60Hz |
| Mobile networks | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card
(dedicated slot) | Not supported |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 1 slot (Single-SIM)
nano-SIM (4FF) |
| Maximum download/upload | 150/50 Mbps | 300/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band detailsCollapse 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 850/900/2100 | CDMA2000 1xEV-DO
UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat4 (Bands 1,3,5,7,8)
TD-LTE (Bands 40) | LTE Cat6 (2, 4, 5, 12, 13, 25, 26, 66, 71)
TD-LTE (41) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE | 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 | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Camera | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Back camera (main camera) | (dual camera)
13 megapixels
5MP depthf/1.2 | (triple camera)
13 megapixels
5MP ultrawidef/2.21.12μm1/5"115º
2MP depthf/2.41.75μm1/5"85º |
| Main camera resolution | 4128x3096 pixels | 4128x3096 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED on main camera and LED on front camera | LED flash |
| Focal aperture | f/1.7 (aperture) | f/1.8 (aperture) |
| Focal length | feature not registered | 26mm lens |
| Sensor size | feature not registered | 1/3" inches |
| Pixel size | feature not registered | 1.12µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | HDR photo on both cameras |
| 2ª camera | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Front camera (secondary) | 13 megapixels | 13 megapixels |
| Front camera resolution | 4128x3096 pixels | 4128x3096 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | LED | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/3" inches |
| Pixel size | feature not registered | 1.12µm pixel |
| Multimedia | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Radio | FM | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, XviD | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, OGG, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
| Connectivity | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| USB | MicroUSB 2.0 | USB 2.0 Type-C, USB OTG On-The-Go |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO |
| DLNA | Not supported | Not supported |
| NFC | Not supported | Not supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging, GLONASS |
| Infrared port | Not supported | Not supported |
| Other functions | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Active noise cancellation | Supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Fingerprint sensor
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Fingerprint sensor (rear-mounted)
|
| Other features | - Colors: Venom Black, Fine Gold
- Aluminum body
- 2.5D glass screen
- USB OTG On-The-Go
- Dolby Atmos audio
- Fast battery charging (Turbo Charge)
- WiFi direct, hotspot
- Splash Resistant | - Colors: Titan gray
- Google Assistant
- DTS:X 3D sound surround
- HAC M3/T3
- WiFi direct, hotspot |
| Power supply | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| Battery | LiPo: Li-Ion polymer (Non removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 4000 mAh | 4000 mAh |
| Charger, watts | Standard charging | 10W (5V/2A) Standard charging |
| Talk time autonomy | 1500 minutes | 25 hours | 1 days | 1260 minutes | 21 hours | 0.9 day |
| Standby | 22680 minutes | 378 hours | 15.8 days | 34560 minutes | 576 hours | 24 days |
| Radiation rate | Lenovo K8 Note (32GB) | LG K51 (K500UM3) |
| 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 |