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LG K51 (K500UMT3) vs LG K42 (K420YM)

Side by side comparison between LG K51 vs LG K42 phones, differences, pros, cons with full specifications. What's the better?

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Compare LG K42 XLG K51 (K500UMT3)06Points
LG K51 (K500UMT3)
6.5"
IPS

720x1560

13
MP

13mp

3GB
RAM

64bit Octa

4000
mAh

(Non removable)

vs
LG K42 (K420YM)
6.6"
IPS

720x1600

13
MP

8mp

3GB
RAM

64bit Octa

4000
mAh

(Non removable)

What's the better phone? LG K42 (K420YM)

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!

K51 (K500UMT3)6 Advantages LG K51 (K500UMT3)vsK42 (K420YM)11 Advantages LG K42 (K420YM)
+1/3" inches3%
The larger sensor camera lets you take photos with better depth.
vs1/3.1" inches
+(front) 13MP60%
Higher resolution secondary camera to take pictures and selfies
vs(front) 8MP
+(4G+ LTE-A) 300 Mbps100%
Faster for surfing the internet and download files
vs(4G LTE) 150 Mbps
+GyroscopeAdvantage
Sensors help you use the device
vsNot supported
+802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMOAdvantage
WiFi 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO is newer and faster
vs802.11 b/g/n (2.4Ghz)
+Panda King GlassAdvantage
Protection against scratches on the screen lets you carry your phone with your keys
vsNot supported
3GB LPDDR3vs+3GB LPDDR4XAdvantage
This RAM type is better and more efficient.
32GB (18GB available)vs+64GB (45GB available)150%
More internal storage for applications and files
204 grams (7.14 ounces)vs+184 grams (6.44 ounces)11%
Lighter
8.47 millimeters (0.33 inches)vs+8.4 millimeters (0.33 inches)1%
Thinner
720x1560 pixelsvs+720x1600 pixels3%
Higher resolution screen
264 PPIvs+266 PPI1%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
6.5"vs+6.6"2%
Larger screen
(triple camera) 13MP + 5MP + 2MPvs+(quad camera) 13MP + 5MP + 2MP + 2MP10%
Higher resolution main camera
Not supportedvs+Face unlockAdvantage
Sensors help you use the device
Not supportedvs+FMAdvantage
The radio lets you listen to your songs and sports in general
Not supportedvs+NFCAdvantage
NFC allows you to make payments by approach quickly and securely

37 Common items in both devices
2Ghz 64bit Octa-Core
eMMC 5.1
Until 1TB microSD, microSDXC
Plastic body, glass front
TFT IPS LCD
60Hz
16 million
+30 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differencesClear highlight
Physical featuresLG K51 (K500UMT3)LG K42 (K420YM)
ModelK51 (K500UMT3)K42 (K420YM)
Other model namesLG K51 (T-Mobile) LMK500UMT3ATMOTN, LM-K500UMT3LG K42 LMK420YM, LM-K420YM Single-SIM
Country or region availableUSA
USA
AustraliaNew Zealand
Australia, New Zealand
BrandLGLG
Release dateMay, 2020September, 2020
Depth8.47 millimeters (0.33 inches)8.4 millimeters (0.33 inches)
Size (width x height)77.92 x 166.96 millimeters (3.07 x 6.57 in)76.7 x 165 millimeters (3.02 x 6.5 in)
Weight204 grams (7.14 ounces)184 grams (6.44 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsPlastic body, glass frontPlastic body, glass front
Protection against water and othersMIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
System (OS)LG K51 (K500UMT3)LG K42 (K420YM)
Operating systemAndroid 10Android 10
Firmware updatefeature not registeredfeature not registered
HardwareLG K51 (K500UMT3)LG K42 (K420YM)
Chipset64bit - MediaTek MT6762 Helio P22 (12nm)64bit - MediaTek MT6762 Helio P22 (12nm)
CPU processorOcta-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A53
1.5Ghz Quad-Core ARM Cortex-A53
Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A53
1.5Ghz Quad-Core ARM Cortex-A53
GPU graphical controllerPowerVR GE8320 650MhzPowerVR GE8320 650Mhz
RAM memory3GB LPDDR33GB LPDDR4X
Internal storage32GB (18GB available)
eMMC 5.1
64GB (45GB available)
eMMC 5.1
External storageUntil 1TB microSD, microSDXC
(dedicated slot)
Until 1TB microSD, microSDXC
(dedicated slot)
DisplayLG K51 (K500UMT3)LG K42 (K420YM)
Display typeTFT IPS LCDTFT IPS LCD
Screen size6.5" inches6.6" inches
Screen-to-body ratio~79.7% (screen-to-body ratio)~83.1% (screen-to-body ratio)
Display resolution720x1560 pixels (19.5:9)720x1600 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)264 PPI266 PPI
Colors16 million16 million
Scratch-resistant glassPanda King GlassNot supported
Display features60Hz60Hz
Mobile networksLG K51 (K500UMT3)LG K42 (K420YM)
Dual-SIMNot supportedNot supported
SIM card1 slot (Single-SIM)
nano-SIM (4FF)
1 slot (Single-SIM)
nano-SIM (4FF)
Maximum download/upload300/50 Mbps150/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkUMTS 850/900/1900/2100UMTS 850/900/1900/2100
Primary 4G networkLTE Cat6 (1, 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 66, 71)
TD-LTE (38, 41)
LTE Cat4 (1, 3, 5, 7, 8, 20, 28)
TD-LTE (38, 39, 40)
VoLTE
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
Secondary 2G networkNot supportedNot supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedNot supported
CallingLG K51 (K500UMT3)LG K42 (K420YM)
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
CameraLG K51 (K500UMT3)LG K42 (K420YM)
Back camera (main camera)(triple camera)
13 megapixels
5MP ultrawidef/2.21.12μm1/5"115º
2MP depthf/2.41.75μm1/5"85º
(quad camera)
13 megapixels
5MP ultrawidef/2.2115º1/5.0"1.12µm
2MP macrof/2.41.75μm
2MP depthf/2.41.75μm
Main camera resolution4128x3096 pixels4128x3096 pixels
Video recording (primary)Full HD (1920x1080) 30 fpsFull HD (1920x1080) 30 fps
FlashLED flashLED flash
Focal aperturef/1.8 (aperture)f/1.8 (aperture)
Focal length26mm lens27mm lens
Sensor size1/3" inches1/3.1" inches
Pixel size1.12µm pixel1.12µm pixel
AutofocusPDAF: phase detection autofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasHDR photo on both cameras
2ª cameraLG K51 (K500UMT3)LG K42 (K420YM)
Front camera (secondary)13 megapixels8 megapixels
Front camera resolution4128x3096 pixels3264x2448 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.0 (aperture)f/2.0 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor size1/3" inchesfeature not registered
Pixel size1.12µm pixelfeature not registered
MultimediaLG K51 (K500UMT3)LG K42 (K420YM)
RadioNot supportedFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC
ConnectivityLG K51 (K500UMT3)LG K42 (K420YM)
USBUSB 2.0 Type-C, USB OTG On-The-GoUSB 2.0 Type-C, USB OTG On-The-Go
TV outputNot supportedUSB Type-C (reversible)
Audio output3.5mm jack3.5mm jack
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO802.11 b/g/n (2.4Ghz)
DLNANot supportedNot supported
NFCNot supportedSupported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging
Infrared portNot supportedNot supported
Other functionsLG K51 (K500UMT3)LG K42 (K420YM)
Active noise cancellationSupportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Fingerprint sensor (rear-mounted)
Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Face unlock
Fingerprint sensor (side-mounted)
Other features- Colors: Titan gray
- Google Assistant
- DTS:X 3D sound surround
- HAC M3/T3
- WiFi direct, hotspot
- Colors: Titan, Green, Red
- Silicon case included
- LG 3D Sound Engine
- WiFi direct, hotspot
Power supplyLG K51 (K500UMT3)LG K42 (K420YM)
BatteryLiPo: Li-Ion polymer (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity4000 mAh4000 mAh
Charger, watts10W (5V/2A) Standard charging10W (5V/2A) Standard charging
Talk time autonomy1260 minutes | 21 hours | 0.9 day960 minutes | 16 hours | 0.7 day
Standby34560 minutes | 576 hours | 24 days10800 minutes | 180 hours | 7.5 days
Radiation rateLG K51 (K500UMT3)LG K42 (K420YM)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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