LG K40 (X420HM) vs Samsung Galaxy S Lightray 4G (SCH-R940)
Side by side comparison between LG K40 vs Samsung Galaxy S Lightray phones, differences, pros, cons and full specifications. What's the better?
,
5.7"
IPS
IPS
720x1440
16
MP
MP
8mp
2GB
RAM
RAM
Octa-core
3000
mAh
mAh
(Non removable)
vs
4.3"
AMOLED
AMOLED
480x800
8
MP
MP
1.3mp
512MB
RAM
RAM
Single-core
1600
mAh
mAh
(Removable)
What's the better phone? LG K40 (X420HM)
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!
24 Advantages 
3 Advantages | 17 Common items in both devices |
| Plastic body, glass front |
| 16 million |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| EIS: Digital stabilization |
| 4G LTE-A / 4G LTE |
| Capacitive |
| +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 K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Model | K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) |
| Other model names | LG K40 LMX420HM, LM-X420HM, LG-LMX420HM | MetroPCS Samsung Galaxy S Lightray 4G R940, Samsung Stealth |
| Country or region available |   (Latin America), Colombia |  USA |
| Brand | LG | Samsung |
| Release date | 3/31/2019 | 8/3/2012 |
| Depth | 8.3 millimeters (0.33 inches) | 11.7 millimeters (0.46 inches) |
| Size (width x height) | 71.9 x 153 millimeters (2.83 x 6.02 in) | 68 x 130 millimeters (2.68 x 5.12 in) |
| Weight | 150 grams (5.25 ounces) | 142 grams (4.97 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 K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Display type | TFT IPS LCD | Super AMOLED Plus |
| Screen size | 5.7" inches | 4.3" inches |
| Screen-to-body ratio | ~76.2% (screen-to-body ratio) | ~59.5% (screen-to-body ratio) |
| Display resolution | 720x1440 pixels | 480x800 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 282 PPI | 217 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| System version | Android 8.1 Oreo | Android 2.3.7 Gingerbread |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Chipset | 64bit: MediaTek Helio P22 (MT6762) (12nm) | 32bit: Samsung Exynos 3210 |
| CPU | Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core) | Single-core, 1 processor: 1x 1GHz ARM Cortex-A8 (Single-core) |
| GPU graphical controller | PowerVR GE8320 (650MHz) | PowerVR SGX540 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| RAM memory | 2GB LPDDR3 | 512MB LPDDR2 |
| Internal storage | 32GB (20GB available) eMMC 5.1 | 2GB (1.39GB available) |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 300/50 Mbps | 75/25 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 | Not supported |
| Primary 2G network | GSM 850/900/1800/1900 | CDMA 800/1700/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO |
| Primary 4G network | LTE Cat6 (Bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 28, 66) | LTE Cat2 (Bands 2, 4) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A | CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, 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 K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Back camera (main camera) | 16 megapixels | 8 megapixels |
| Main camera resolution | 4608x3456 pixels | 3264x2448 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | HD (1280x720) 30 fps |
| Flash | LED flash on both cameras | LED flash |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | feature not registered |
| Pixel size | 1µm pixel | feature not registered |
| 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 |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Front camera (secondary) | 8 megapixels | 1.3 megapixels |
| Front camera resolution | 3264x2448 pixels | 1280x1024 pixels |
| Video recording (secondary) | Full HD (1920x1080) | VGA (640x480) |
| Front flash | LED | Not supported |
| Focal aperture | f/2.0 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | FM | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+ |
🔌 Connectivity | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Micro HDMI Type D |
| Bluetooth | 5.0 + A2DP/LE | 3.0 + 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) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging |
| NFC | Not supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Sensors | Accelerometer Ambient light sensor Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3000 mAh | 1600 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 8 hours | 3.5 hours |
| Standby | 100 hours (4.2 days) | 200 hours (8.3 days) |
➕ Other features | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (Swype), 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, Flash player |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black, Moroccan Blue, Platinum Gray • 18:9 ratio FullVision display • LED notification • DTS-X Surround sound | • Colors: Black • 16GB microSD included • Samsung TouchWiz 4.0 UI • HDMI 1.4 • HAC M4/T4 • WiFi hotspot • Java framework |
☢️ Radiation rate | ||
| LG K40 (X420HM) | Galaxy S Lightray 4G (SCH-R940) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.95W/kg (head), 0.82W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |