Samsung Galaxy A40 vs. LG K51S

Phone Comparison, Reviews and Tests

Detailed comparison and review of Samsung Galaxy A40 and LG K51S. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.

Phone Specifications Comparison

Samsung Galaxy A40 vs. LG K51S Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy A40 LG K51S
Product Type Smartphone Smartphone
Manufacturer Model Number SM-A405FN/DS LM-K510EMW
Form Factor Touch Touch
Height 144.4 mm 165.2 mm LG K51S has greater height than Samsung Galaxy A40.
Width 69.2 mm 76.7 mm LG K51S has greater width than Samsung Galaxy A40.
Depth 7.9 mm 8.26 mm Samsung Galaxy A40 is narrower than Samsung Galaxy A40.
Weight 140 g 194 g Samsung Galaxy A40 is lighter than Samsung Galaxy A40.
Body Colour Blue | Coral | White | Black Pink | Titan
Waterproof (Water-resistant) - -
SAR Value 1.34 W/kg (body), 0.49 W/kg (head) 1.335 W/kg (body), 0.501 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
SIM Card Configuration Details Nano SIM + nano SIM/microSD -
DISPLAY Samsung Galaxy A40 LG K51S
Display Type OLED display LCD display
Display Technology Super AMOLED IPS
Screen Size (Display Size) 5.9" 6.55" LG K51S has larger screen size than Samsung Galaxy A40.
Screen Resolution (Display Resolution) 2340 x 1080 pixels 1600 x 720 pixels Samsung Galaxy A40 has better screen resolution than LG K51S.
Display Format Full HD+ HD+
Pixel Density 439 ppi 268 ppi Samsung Galaxy A40 has better pixel density than LG K51S.
Aspect Ratio - 20:9
Max Brightness - 400 cd/m²
Colour Depth 16.7 million colours -
Display Enhancement Technology Blue light filter -
Display Features Always-on display, Infinity Display, Edge-to-Edge screen Reading mode, FullVision display, night mode, hole in display
Display Protection (Screen Protector) - Tempered glass
PROCESSOR Samsung Galaxy A40 LG K51S
Processor Type (CPU) Samsung Exynos MediaTek
Processor Number 7904 MT6765
Clock Speed 1.8 GHz 2.3 GHz LG K51S has higher clock speed than Samsung Galaxy A40.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture - Yes LG K51S has 64-bit architecture.
Graphics System (GPU) - IMG PowerVR GE8320
MEMORY Samsung Galaxy A40 LG K51S
RAM 4 GB 3 GB Samsung Galaxy A40 has more RAM than LG K51S.
Internal Memory Size (Storage Capacity) 64 GB 64 GB Both phones have the same internal memory capacity.
User Memory 49.4 GB 50.2 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 512 GB microSDHC, microSDXC - up to 2 TB
CAMERA Samsung Galaxy A40 LG K51S
MAIN CAMERA
Number of Main Cameras 2 4
Sensor Resolution 16 Megapixel 32 Megapixel LG K51S has better camera resolution than Samsung Galaxy A40.
Lens Type Wide-angle lens -
Lens Aperture F/1.7 F/1.8 Samsung Galaxy A40 has better lens aperture than Samsung Galaxy A40.
Field of View (FoV) - 76.3 degree(s)
Focus Adjustment Automatic Automatic
Minimum Focal Length (Focal Distance) - 24 mm
Digital Zoom - 8x
Self-Timer Delay - Yes
Special Effects - HDR
Camera Modes Panorama, Pro mode, HYPERLAPSE, portrait mode, AR Emoji, Flowers, Animals, Landscapes, Trees, Sky, Mountains, Beaches, Street scenes, Waterfalls, Snow, Birds, Text, Food, Indoor, Night view, Sunsets, Portaits, Green, Sunrises, Shore Burst mode, portrait mode, Flowers, Animals, Food, Person, Sunset, Sunrise, City, Landscape
Face Recognition (Face ID) - Face detection LG K51S has face detection.
White Balance - Automatic
Light Source LED flash LED flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps 1920 x 1080 (1080p) at 30 fps
Camera Features (Functions) AR sticker, Scene Optimiser, 20 different scenes, Smart professional framing, fault detection Phase Detect Auto-Focus (PDAF), geotagging, Big Pixels technology, Quad Pixel technology
SECOND CAMERA
Sensor Resolution (2nd Camera) 5 Megapixel 5 Megapixel Both phones have the same second camera resolution.
Lens Type (2nd Camera) Ultra wide-angle lens Super wide-angle lens
Lens Aperture (2nd Camera) F/2.2 F/2.2 Both phones have the same second camera lens aperture.
Field of View (2nd Camera) 123 degree(s) 115 degree(s) Samsung Galaxy A40 has larger second camera lens field of view than LG K51S.
Minimum Focal Length (2nd Camera) - 16 mm
THIRD CAMERA
Sensor Resolution (3rd Camera) - 2 Megapixel
Lens Aperture (3rd Camera) - F/2.4
Field of View (3rd Camera) - 88.9 degree(s)
Camera Functions (3rd Camera) - Depth camera
FOURTH CAMERA
Sensor Resolution (4th Camera) - 2 Megapixel
Lens Aperture (4th Camera) - F/2.4
Field of View (4th Camera) - 88.6 degree(s)
Camera Functions (4th Camera) - Macro camera
Camera Features (4th Camera) - 4cm macro photography
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 25 Megapixel 13 Megapixel Samsung Galaxy A40 has better front camera resolution than LG K51S.
Lens Aperture (Front) F/2.0 -
Focus Adjustment Automatic -
Camera Modes (Front) Portrait mode, AR Emoji, Motion Photos Gesture Shot, Selfie portrait
Face Recognition (Face ID) - Face detection LG K51S has face detection.
Light Source (Front) Display flash -
Camera Features (Front) Floating camera button 17 filters
BATTERY AND CHARGING Samsung Galaxy A40 LG K51S
Battery Capacity (Battery Size) 3100 mAh 4000 mAh LG K51S has larger battery capacity than Samsung Galaxy A40.
Fast Charging Technology Samsung Fast Charging - Samsung Galaxy A40 has fast charging technology.
Standby Time - 100 hours
Talk Time 1080 minutes 480 minutes Samsung Galaxy A40 has longer battery life when making calls than LG K51S.
Run Time Details Active online usage (3G): up to 9 hrs
Active online usage (4G): up to 11 hrs
Active online usage (Wi-Fi): up to 11 hrs
Playback (video): up to 14 hrs
Playback (audio): up to 62 hrs
Talk (3G): up to 1080 min
Talk: up to 480 min
Standby: up to 100 hrs
Battery Technology - Lithium Ion
CELLULAR Samsung Galaxy A40 LG K51S
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 4G Both phones have the same mobile network generation.
Operating System Android 9.0 Pie Android 9.0 Pie
User Interface Samsung One UI LG UX 9
Intelligent Assistant Bixby Google Assistant
Navigation GPS, GLONASS, BeiDou, Galileo GPS
COMMUNICATIONS Samsung Galaxy A40 LG K51S
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band Band 1, Band 2, Band 5, Band 8 -
3G UMTS Frequency 2100, 1900, 850, 900 -
4G LTE Band Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 38, Band 40, Band 41 Band 1, Band 3, Band 7, Band 8, Band 20, Band 38
4G LTE Frequency FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2600, TDD 2300, TDD 2500 FDD 2100, FDD 1800+, FDD 2600, FDD 900, FDD 800 DD, TDD 2600
Wireless Interface IEEE 802.11a/b/g/n/ac, ANT+ IEEE 802.11a/b/g/n
Bluetooth Bluetooth 5.0 LE Bluetooth 5.0 BLE
Bluetooth Profiles - HFP, HSP, OPP, PAN, SPP, GOEP, A2DP, AVRCP, HID, SAP, GAVDP, PBAP, MAP, GATT, HDP, HOGP, ScPP
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS SMS, MMS
MEDIA Samsung Galaxy A40 LG K51S
Supported Digital Audio Standards WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID WMA, AAC, PCM, MP3, FLAC, AAC +, eAAC+, OPUS, AMR-WB, AMR-NB, Vorbis
Supported Digital Video Standards MKV, FLV, AVI, MPEG-4, WMV, ASF, 3GP, M4V, WebM, 3G2 MKV, FLV, AVI, WMV, ASF, 3GP, TS, WebM, OGM, MP4
Sound Enhancements Dolby Atmos sound technology DTS: X 3D Surround Sound
FEATURES Samsung Galaxy A40 LG K51S
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert
Sensors Accelerometer, ambient light sensor, proximity sensor, gyro sensor, hall sensor, geomagnetic sensor Accelerometer, ambient light sensor, proximity sensor, digital compass
Security Devices Face recognition, fingerprint reader Fingerprint reader
Additional Phone Features Alarm Clock, Fast Charging DLNA Certified, Dual microphones, KnockON, QuickMemo+ function, Mini View function, Capture+, EasyHome, Clip Tray, Google Lens, AI Cam, Game Tools, Google Assistant Button
OTHERS Samsung Galaxy A40 LG K51S
Included Accessories Power adapter Power adapter, SIM card removal tool, USB-C cable
Compliant Standards - MIL-STD 810G
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