LG K51 (K500MM) vs LG K9 (X210EM)
Side by side comparison between LG K51 vs LG K9 phones, differences, pros, cons and full specifications. What's the better?
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6.5"
IPS
IPS
720x1560
13
MP
MP
13mp
3GB
RAM
RAM
Octa-core
4000
mAh
mAh
(Non removable)
vs
What's the better phone? LG K51 (K500MM)
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!
25 Advantages 
5 Advantages | 17 Common items in both devices |
| Plastic body, glass front |
| TFT IPS LCD |
| 16 million |
| LED flash |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| EIS: Digital stabilization |
| +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 (K500MM) | LG K9 (X210EM) | |
| Model | K51 (K500MM) | LG K9 (X210EM) |
| Other model names | LG K51 (Metro by T-Mobile) LMK500MMAMTPTN, LM-K500MM | LG K9 LMX210EM, LM-X210EM, LG K8 2018 |
| Country or region available |  USA |  (Europe) |
| Brand | LG | LG |
| Release date | 5/1/2020 | 4/1/2018 |
| Depth | 8.47 millimeters (0.33 inches) | 8.2 millimeters (0.32 inches) |
| Size (width x height) | 77.92 x 166.96 millimeters (3.07 x 6.57 in) | 73.2 x 146.3 millimeters (2.88 x 5.76 in) |
| Weight | 204 grams (7.14 ounces) | 152 grams (5.32 ounces) |
| Build, materials | Plastic body, glass front | Plastic body, glass front |
| Protection against water and others | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | Not supported |
📲 Display | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 6.5" inches | 5" inches |
| Screen-to-body ratio | ~79.7% (screen-to-body ratio) | ~64.4% (screen-to-body ratio) |
| Display resolution | 720x1560 pixels (19.5:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 264 PPI | 294 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Panda King Glass | Not supported |
| Refresh rate | 60Hz | feature not registered |
| Display features | Not supported | feature not registered |
🤖 Operating System | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| System version | Android 10 | Android 7.1.2 Nougat |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Chipset | 64bit: MediaTek Helio P22 (MT6762) (12nm) | 32bit: Qualcomm Snapdragon 210 MSM8909 (28nm) |
| CPU | Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core) | Quad-core, 1 processor: 4x 1.3GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | PowerVR GE8320 (650MHz) | Qualcomm Adreno 304 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| RAM memory | 3GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 32GB (18GB available) eMMC 5.1 | 16GB (9GB available) eMMC 4.5 |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 300/50 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 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 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat6 (1, 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 66, 71) TD-LTE (38, 41) | LTE Cat4 (Bands 1,3,7,8,20) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE |
| Secondary 2G network | Not supported | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | Not supported |
📷 Camera | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Back camera (main camera) | (triple camera) 13 megapixels 5MP ultrawide f/2.21.12μm1/5"115° 2MP depth f/2.41.75μm1/5"85° | 8 megapixels |
| Main camera resolution | 4128x3096 pixels | 3264x2448 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | HD (1280x720) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | 26mm lens | feature not registered |
| Sensor size | 1/3" inches | 1/4" inches |
| Pixel size | 1.12µm pixel | 1.12µm pixel |
| Autofocus | PDAF: phase detection autofocus | 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 only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Front camera (secondary) | 13 megapixels | 5 megapixels |
| Front camera resolution | 4128x3096 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | 1/5" inches |
| Pixel size | 1.12µm pixel | 1.12µm pixel |
🔉 Sound and multimedia | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | Not supported | FM (RDS) |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.264, H.263, MKV, XviD |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, OGG, eAAC+, FLAC |
🔌 Connectivity | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.2 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Not supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) BL-45F1F |
| Battery capacity | 4000 mAh | 2500 mAh |
| Charger, watts | 10W (5V/2A) Wired charging | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | 21 hours | 7 hours |
| Standby | 576 hours (24 days) | 250 hours (10.4 days) |
➕ Other features | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| Call control | Voice dialing, Voice recorder | 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: Titan gray • Google Assistant • DTS:X 3D sound surround • HAC M3/T3 | • Colors: Aurora Black, Moroccan Blue, Terra Gold • Plastic body |
☢️ Radiation rate | ||
| LG K51 (K500MM) | LG K9 (X210EM) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.92W/kg (head), 1.11W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.763W/kg (head), 1.43W/kg (body) |