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Samsung Galaxy S9 Plus (SM-G9650 128GB) vs LG K31 (K300QM)

Side by side comparison between Samsung Galaxy S9 Plus vs LG K31 phones, differences, pros, cons and full specifications. What's the better?

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Compare LG K31 X Samsung Galaxy S9 Plus (SM-G9650 128GB) 40Points
6.2"
AMOLED

1440x2960

12.2
MP

8mp

6GB
RAM

Octa-core

3500
mAh

(Non removable)

vs
5.7"
IPS

720x1520

13
MP

5mp

2GB
RAM

Octa-core

3000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S9 Plus (SM-G9650 128GB)

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!

Galaxy S9 Plus (SM-G9650 128GB)} 40 Advantages Samsung Galaxy S9 Plus (SM-G9650 128GB) vs K31 (K300QM)} 2 Advantages LG K31 (K300QM)
+2.8GHz 64bit Octa-core (10nm)49%
More powerful processor, you can open your applications faster
vs2GHz 64bit Octa-core (12nm)
+6GB LPDDR4X2 times
More RAM memory. Typically more responsive and better for multitasking.
vs2GB LPDDR3
+128GB (111GB available)6 times
More internal storage for applications and files
vs32GB (17GB available)
+UFS 2.1Advantage
Fastest write and read storage.
vseMMC 5.1
+8.5 millimeters (0.33 inches)1%
Thinner
vs8.6 millimeters (0.34 inches)
+Aluminum frame, glass front/backAdvantage
More resistant material
vsPlastic body, glass front
+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
vsTFT IPS LCD
+HDR10Advantage
The HDR10 display provides vibrant colors and more details
vsNot supported
+1440x2960 pixels3 times
Higher resolution screen
vs720x1520 pixels
+531 PPI80%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs295 PPI
+6.2"9%
Larger screen
vs5.7"
+(dual camera) 12.2MP + 12MP36%
Higher resolution main camera
vs(dual camera) 13MP + 5MP
+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
vsOnly digital zoom
+OIS: Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
vsEIS: Digital stabilization
+1/2.55" inches22%
The larger sensor camera lets you take photos with better depth.
vs1/3.1" inches
+f/1.5 (aperture)20%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
vsf/1.8 (aperture)
+(front) 8MP63%
Higher resolution secondary camera to take pictures and selfies
vs(front) 5MP
+4K UHD (3840x2160)3 times
More image quality for recording videos with the primary camera
vsFull HD (1920x1080)
+(front) 2K UHD (2560x1440)78%
More image quality for recording videos with the secondary camera
vs(front) Full HD (1920x1080)
+Android 11Advantage
Android 11 is newer and safer
vsAndroid 10
+(4G LTE-A) 1200 Mbps7 times
Faster for surfing the internet and download files
vs(4G LTE) 150 Mbps
+Ambient light sensorAdvantage
Sensors help you use the device
vsNot supported
+ANT+Advantage
Sensors help you use the device
vsNot supported
+BarometerAdvantage
Sensors help you use the device
vsNot supported
+CompassAdvantage
Sensors help you use the device
vsNot supported
+Face unlockAdvantage
Sensors help you use the device
vsNot supported
+GyroscopeAdvantage
Sensors help you use the device
vsNot supported
+Heart rateAdvantage
Sensors help you use the device
vsNot supported
+Iris scannerAdvantage
Sensors help you use the device
vsNot supported
+Proximity sensorAdvantage
Sensors help you use the device
vsNot supported
+SpO2Advantage
Sensors help you use the device
vsNot supported
+3500 mAh17%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
vs3000 mAh
+Qi wireless charging (Qi/PMA)Advantage
Wireless charging is another way to charge the battery.
vsNot supported
+2 slots (Dual-SIM)
(hybrid slot/shares the same microSD slot)Advantage
You can have more mobile carriers/operators on the same device.
vs1 slot (Single-SIM)
(dedicated slot)
+FMAdvantage
The radio lets you listen to your songs and sports in general
vsNot supported
+802.11 a/b/g/n/ac [wifi5]Advantage
WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster
vs802.11 b/g/n [wifi4]
+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
vsNot supported
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
+USB 3.1 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
vsMicroUSB 2.0
+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
vsMicroUSB 2.0
189 grams (6.62 ounces)vs+146 grams (5.11 ounces)29%
Lighter
IP68 certifiedvs+MIL-STD-810G military certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

17 Common items in both devices
Until 1TB microSD, microSDXC / Until 512GB microSD, microSDXC
60Hz
16 million
LED flash
PDAF on back camera and autofocus front camera / PDAF: phase detection autofocus
HDR photo/video on both cameras / HDR photo on both cameras
4G LTE-A / 4G LTE
+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

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
ModelGalaxy S9 Plus (SM-G9650 128GB)K31 (K300QM)
Other model namesGalaxy S9+ SM-G9650/DS (Snapdragon), SM-G9650/1DLLG K31 (Unlocked), LMK300QMAUSASV, LM-K300Q
Country or region availableBrazilChina
Brazil, China
USA
USA
BrandSamsungLG
Release date3/9/2018, Announced: 2/25/20188/21/2020
Depth8.5 millimeters (0.33 inches)8.6 millimeters (0.34 inches)
Size (width x height)73.8 x 158.1 millimeters (2.91 x 6.22 in)71.12 x 147.83 millimeters (2.8 x 5.82 in)
Weight189 grams (6.62 ounces)146 grams (5.11 ounces)
Build, materialsAluminum frame, glass front/back
Back: Gorilla Glass 5
Plastic body, glass front
Protection against water and othersIP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistantMIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.

📲 Display

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Display typeSuper AMOLEDTFT IPS LCD
Screen size6.2" inches5.7" inches
Screen-to-body ratio~83.6% (screen-to-body ratio)~77.1% (screen-to-body ratio)
Display resolution1440x2960 pixels (18.5:9)720x1520 pixels (19:9)
TouchscreenCapacitive Multitouch 10-pointsCapacitive Multitouch
Pixel density (dot pitch)531 PPI295 PPI
Colors16 million16 million
Scratch-resistant glassGorilla Glass 5Panda King Glass
Refresh rate60Hz60Hz
Display featuresHDR10
Always-On Display
Not supported

🤖 Operating System

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
System versionAndroid 8.0 OreoAndroid 10
Firmware updateAndroid 11feature not registered
User InterfaceOne UI 2.5 / 3.1feature not registered

⚙️ Processor

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Chipset64bit: Qualcomm Snapdragon 845 (SDM845) (10nm)64bit: MediaTek Helio P22 (MT6762) (12nm)
CPUOcta-core, 2 processors:
4x 2.8GHz Kryo 385 Gold (Quad-core)
4x 1.7GHz Kryo 385 Silver (Quad-core)
Octa-core, 2 processors:
4x 2GHz ARM Cortex-A53 (Quad-core)
4x 1.5GHz ARM Cortex-A53 (Quad-core)
GPU graphical controllerQualcomm Adreno 630 (710MHz)PowerVR GE8320 (650MHz)
Performance (benchmark)AnTuTu: 265163 (v7), 344891 (v8)
Geekbench: 8393 (4.2)
feature not registered

💽 Memory and storage

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
RAM memory6GB LPDDR4X2GB LPDDR3
Internal storage128GB (111GB available)
UFS 2.1
32GB (17GB available)
eMMC 5.1
External storageUntil 1TB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot)
Until 512GB microSD, microSDXC
(dedicated slot)

📶 Mobile networks

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Dual-SIMDual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot)
Not supported
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
1 slot (Single-SIM)
nano-SIM (4FF)
Maximum Download / Upload1200/150 Mbps150/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkCDMA 800, GSM 850/900/1800/1900CDMA 800/1900, GSM 850/900/1800/1900
Primary 3G networkCDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
CDMA2000 1xEV-DO
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat18 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 66)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
LTE Cat4 (2, 4, 5, 12, 13, 25, 26, 66, 71)
TD-LTE (41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
Secondary 2G networkGSM 850/900/1800/1900Not supported
Secondary 3G networkUMTS 850/900/1700/1900/2100Not supported
Secondary 4G networkLTE Cat18 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 66)
TD-LTE (34, 38, 39, 40, 41)
VoLTE
Not supported
Secondary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-ANot supported

📷 Camera

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Back camera (main camera)(dual camera)
12.2 megapixels
12MP telephoto f/2.41/3.4"52mm1.0µmAFOIS2x-optical-zoom
(dual camera)
13 megapixels
5MP ultrawide f/2.2120°1/5.0"1.12µm
Main camera resolution4032x3024 pixels4128x3096 pixels
Video recording (primary)4K UHD (3840x2160) 60 fpsFull HD (1920x1080) 30 fps
FlashLED flashLED flash
Focal aperturef/1.5 (aperture)f/1.8 (aperture)
Focal length26mm lens27mm lens
Sensor size1/2.55" inches1/3.1" inches
Pixel size1.4µm pixel1.12µm pixel
AutofocusPDAF on back camera and autofocus front cameraPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS: Optical stabilizationEIS: Digital stabilization
ZoomDigital and optical zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorSupportedNot supported
HDRHDR photo/video on both camerasHDR photo on both cameras
Camera extras1080p@240fps
720p@960fps
feature not registered

📸 Front camera

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Front camera (secondary)8 megapixels5 megapixels
Front camera resolution3264x2448 pixels2560x1920 pixels
Video recording (secondary)2K UHD (2560x1440)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/1.7 (aperture)f/2.2 (aperture)
Focal length25mm lens24mm lens
Sensor size1/3.6" inches1/5" inches
Pixel size1.22µm pixel1.12µm pixel

🔉 Sound and multimedia

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
LoudspeakerStereo sound
32-bit/384kHz
Dolby Atmos
Tuned by AKG
Supported
Active noise cancellation2 microphones or more2 microphones or more
RadioFMNot supported
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, DivX, XviDMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, WAV, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
USBUSB 3.1 Type-C, USB OTG On-The-GoMicroUSB 2.0
Audio output3.5mm jack3.5mm jack
TV outputUSB Type-C (reversible)Not supported
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
802.11 b/g/n [wifi4] (2.4GHz)
WiFi Direct, hotspot
DLNASupportedNot supported
GPSA-GPS, GeoTagging, GLONASS, GALILEO, BeiDouA-GPS, GeoTagging
NFCSupportedNot supported
Infrared portNot supportedNot supported

🧭 Sensors

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
SensorsAccelerometer
Ambient light sensor
ANT+
Barometer
Compass
Face unlock
Fingerprint sensor (rear-mounted)
Gyroscope
Hall effect
Heart rate
Iris scanner
Proximity sensor
SpO2
Accelerometer
Fingerprint sensor (rear-mounted)
Vibrating alertSupportedSupported

🔋 Battery

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Battery typeLi-Ion: lithium-ion (Non removable)Li-Ion: lithium-ion (Non removable)
Battery capacity3500 mAh3000 mAh
Charger, watts15W (9V/1.67A) Wired fast charging
Quick Charge 2
Wired charging
Inductive / wireless chargingQi wireless charging (Qi/PMA)Not supported
Talk time autonomyfeature not registered11 hours
Standbyfeature not registered528 hours (22 days)

➕ Other features

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder, Voice commands
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Black, Silver, Blue, Gold, Orchid Gray
• Samsung DeX
• Samsung Gear VR
• Samsung Pay
• Colors: Silver
• LG UX 9.1

☢️ Radiation rate

Galaxy S9 Plus (SM-G9650 128GB)LG K31 (K300QM)
SAR 1.6W/kg (USA, Mexico, etc.)0.61W/kg (head), 0.77W/kg (body)0.61W/kg (head), 1.13W/kg (body)
SAR 2W/kg (Europe, UK, etc.)0.28W/kg (head), 1.08W/kg (body)feature not registered
X

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