In depth comparison and review of LG K4 K120E and LG K51S. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | LG K4 K120E | LG K51S |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | K120E | LM-K510EMW | |
| Form Factor | Touch | Touch | |
| Height | 131.9 mm | 165.2 mm | LG K51S has greater height than LG K4 K120E. |
| Width | 66.6 mm | 76.7 mm | LG K51S has greater width than LG K4 K120E. |
| Depth | 8.9 mm | 8.26 mm | LG K51S is narrower than LG K4 K120E. |
| Weight | 120 g | 194 g | LG K4 K120E is lighter than LG K4 K120E. |
| Body Colour | Indigo | Pink | Titan | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.19 W/kg (body), 0.604 W/kg (head) | 1.335 W/kg (body), 0.501 W/kg (head) | |
| Integrated Components | FM radio | - | |
| Connector Type | Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
|
| SIM Card Type (Size) | Micro SIM | Nano SIM | |
| SIM Card Qty | - | Dual-SIM |
| DISPLAY | LG K4 K120E | LG K51S |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | IPS | |
| Screen Size (Display Size) | 4.5" | 6.55" | LG K51S has larger screen size than LG K4 K120E. |
| Screen Resolution (Display Resolution) | 854 x 480 pixels | 1600 x 720 pixels | LG K51S has better screen resolution than LG K4 K120E. |
| Display Format | - | HD+ | |
| Pixel Density | 218 ppi | 268 ppi | LG K51S has better pixel density than LG K4 K120E. |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 400 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| Display Features | In-Cell Display Technology | Reading mode, FullVision display, night mode, hole in display | |
| Display Protection (Screen Protector) | - | Tempered glass |
| PROCESSOR | LG K4 K120E | LG K51S |
|---|
| Processor Type (CPU) | MediaTek | MediaTek | |
|---|---|---|---|
| Processor Number | MT6735M | MT6765 | |
| Clock Speed | 1 GHz | 2.3 GHz | LG K51S has higher clock speed than LG K4 K120E. |
| Processor Core Qty | Quad-core | 8-core | LG K51S has higher processor core quantity than LG K4 K120E. |
| 64-bit Architecture | - | Yes | LG K51S has 64-bit architecture. |
| Graphics System (GPU) | - | IMG PowerVR GE8320 |
| MEMORY | LG K4 K120E | LG K51S |
|---|
| RAM | 1 GB | 3 GB | LG K51S has more RAM than LG K4 K120E. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 8 GB | 64 GB | LG K51S has more internal memory than LG K4 K120E. |
| User Memory | - | 50.2 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC - up to 32 GB | microSDHC, microSDXC - up to 2 TB |
| CAMERA | LG K4 K120E | LG K51S |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 4 | |
|---|---|---|---|
| Sensor Resolution | 5 Megapixel | 32 Megapixel | LG K51S has better camera resolution than LG K4 K120E. |
| Lens Aperture | - | F/1.8 | |
| Field of View (FoV) | - | 76.3 degree(s) | |
| Focus Adjustment | Automatic | Automatic | |
| Minimum Focal Length (Focal Distance) | - | 24 mm | |
| Digital Zoom | 4x | 8x | LG K51S has better digital zoom than LG K4 K120E. |
| Self-Timer Delay | Yes | Yes | |
| Special Effects | - | HDR | |
| Camera Modes | - | 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 | Automatic | |
| Light Source | LED light | LED flash | |
| Still Image Resolutions | 2560 x 1920 | - | |
| Video Resolutions | 1280 x 720 (720p) | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Touch & Shoot | Phase Detect Auto-Focus (PDAF), geotagging, Big Pixels technology, Quad Pixel technology |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 5 Megapixel | |
|---|---|---|---|
| Lens Type (2nd Camera) | - | Super wide-angle lens | |
| Lens Aperture (2nd Camera) | - | F/2.2 | |
| Field of View (2nd Camera) | - | 115 degree(s) | |
| 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) | 2 Megapixel | 13 Megapixel | LG K51S has better front camera resolution than LG K4 K120E. |
| Camera Modes (Front) | - | Gesture Shot, Selfie portrait | |
| Face Recognition (Face ID) | - | Face detection | LG K51S has face detection. |
| Camera Features (Front) | - | 17 filters |
| BATTERY AND CHARGING | LG K4 K120E | LG K51S |
|---|
| Battery Capacity (Battery Size) | 1940 mAh | 4000 mAh | LG K51S has larger battery capacity than LG K4 K120E. |
|---|---|---|---|
| Standby Time | 510 hours | 100 hours | LG K4 K120E has longer standby time than LG K51S. |
| Talk Time | 1200 minutes | 480 minutes | LG K4 K120E has longer battery life when making calls than LG K51S. |
| Run Time Details | Talk (GSM): up to 1200 min Talk (WCDMA): up to 540 min Standby (GSM): up to 510 hrs Standby (WCDMA): up to 500 hrs Standby (LTE): up to 460 hrs |
Talk: up to 480 min Standby: up to 100 hrs |
|
| Battery Technology | Lithium Ion | Lithium Ion |
| CELLULAR | LG K4 K120E | 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 5.1.1 (Lollipop) | Android 9.0 Pie | |
| User Interface | - | LG UX 9 | |
| Intelligent Assistant | - | Google Assistant | |
| Navigation | A-GPS | GPS |
| COMMUNICATIONS | LG K4 K120E | LG K51S |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, 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 | |
| 4G LTE Band | - | Band 1, Band 3, Band 7, Band 8, Band 20, Band 38 | |
| 4G LTE Frequency | - | FDD 2100, FDD 1800+, FDD 2600, FDD 900, FDD 800 DD, TDD 2600 | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11a/b/g/n | |
| Bluetooth | Bluetooth 4.1 | Bluetooth 5.0 BLE | |
| Bluetooth Profiles | HFP, HSP, OPP, PAN, A2DP, AVRCP, HID, PBAP, MAP, SSP, DIP, GATT, HDP, HOGP | HFP, HSP, OPP, PAN, SPP, GOEP, A2DP, AVRCP, HID, SAP, GAVDP, PBAP, MAP, GATT, HDP, HOGP, ScPP | |
| NFC | - | Yes | LG K51S has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | SMS, MMS |
| MEDIA | LG K4 K120E | LG K51S |
|---|
| Supported Digital Audio Standards | WAV, AAC, PCM, Ogg Vorbis, AMR, MP3, FLAC, AAC +, OGG, eAAC+, MIDI | WMA, AAC, PCM, MP3, FLAC, AAC +, eAAC+, OPUS, AMR-WB, AMR-NB, Vorbis | |
|---|---|---|---|
| Supported Digital Video Standards | XviD, MPEG-4, H.264, H.263, VP8, VP9 | MKV, FLV, AVI, WMV, ASF, 3GP, TS, WebM, OGM, MP4 | |
| Sound Enhancements | - | DTS: X 3D Surround Sound |
| FEATURES | LG K4 K120E | 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 | Accelerometer, ambient light sensor, proximity sensor, digital compass | |
| Security Devices | - | Fingerprint reader | |
| Additional Phone Features | Knock Code function, Smart Keyboard, Easy Home mode, QuickMemo+ function | DLNA Certified, Dual microphones, KnockON, QuickMemo+ function, Mini View function, Capture+, EasyHome, Clip Tray, Google Lens, AI Cam, Game Tools, Google Assistant Button |
| OTHERS | LG K4 K120E | LG K51S |
|---|
| Included Accessories | USB cable, power adapter | Power adapter, SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | - | MIL-STD 810G |
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