Asus ROG Phone 3 (512GB/16GB) vs LG K42 (K420HMW)
Side by side comparison between Asus ROG Phone 3 vs LG K42 phones, differences, pros, cons and full specifications. What's the better?
,
6.59"
AMOLED
AMOLED
1080x2340
64
MP
MP
24mp
16GB
RAM
RAM
Octa-core
6000
mAh
mAh
(Non removable)
vs
6.6"
IPS
IPS
720x1600
13
MP
MP
8mp
3GB
RAM
RAM
Octa-core
4000
mAh
mAh
(Non removable)
What's the better phone? Asus ROG Phone 3 (512GB/16GB)
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!
25 Advantages 
7 Advantages | 20 Common items in both devices |
| LED flash |
| Only digital zoom |
| PDAF: phase detection autofocus |
| EIS: Digital stabilization |
| HDR photo on both cameras |
| f/1.8 (aperture) |
| (front) Full HD (1920x1080) |
| +13 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 | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Model | ROG Phone 3 (512GB/16GB) | K42 (K420HMW) |
| Other model names | Asus ROG Phone 3 ZS661KS, ZS661KSF (16GB RAM) | LG K42 LMK420HMW, LM-K420HMW Dual-SIM |
| Country or region available |  (Global, International) |        (Latin America), Colombia, Costa Rica, Guatemala, Honduras, Nicaragua, Panama |
| Brand | Asus | LG |
| Release date | 7/22/2020 | 9/21/2020 |
| Depth | 9.85 millimeters (0.39 inches) | 8.4 millimeters (0.33 inches) |
| Size (width x height) | 78 x 171 millimeters (3.07 x 6.73 in) | 76.7 x 165 millimeters (3.02 x 6.5 in) |
| Weight | 240 grams (8.4 ounces) | 184 grams (6.44 ounces) |
| Build, materials | Aluminum frame, glass front/back | Plastic body, glass front |
| Protection against water and others | Not supported | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Display type | AMOLED | TFT IPS LCD |
| Screen size | 6.59" inches | 6.6" inches |
| Screen-to-body ratio | ~79.9% (screen-to-body ratio) | ~83.1% (screen-to-body ratio) |
| Display resolution | 1080x2340 pixels (19.5:9) | 720x1600 pixels (20:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 391 PPI | 266 PPI |
| Colors | 1 billion | 16 million |
| Scratch-resistant glass | Gorilla Glass 6 | Not supported |
| Refresh rate | 144Hz | 60Hz |
| Display features | 650nits[typ] HDR10+ | Not supported |
🤖 Operating System | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| System version | Android 10 | Android 10 |
| Firmware update | feature not registered | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Chipset | 64bit: Qualcomm Snapdragon 865+ (SM8250-AB) (7nm) | 64bit: MediaTek Helio P22 (MT6762) (12nm) |
| CPU | Octa-core, 3 processors: 1x 3.09GHz Kryo 585 (Single-core) 3x 2.42GHz Kryo 585 (Triple-core) 4x 1.8GHz Kryo 585 (Quad-core) | Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 650 (250-646MHz) | PowerVR GE8320 (650MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| RAM memory | 16GB LPDDR5 | 3GB LPDDR4X |
| Internal storage | 512GB (479GB available) UFS 3.1 | 64GB (45GB available) eMMC 5.1 |
| External storage | Not supported | Until 1TB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 5000/150 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800, GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 800/850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat20 VoLTE A version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 66, 71) TD-LTE (34, 38, 39, 40, 41, 42, 48) B version: LTE (1, 2, 3, 4, 5, 7, 8, 20, 28) TD-LTE (34, 38, 39, 40, 41) | LTE Cat4 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 28, 66) TD-LTE (38) VoLTE |
| Primary 5G network | A version: SA/NSA (1, 2, 3, 5, 28, 41, 66, 71, 77, 78, 79) B version: SA/NSA (41, 77, 78, 79) | Not supported |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | GPRS, EDGE |
📷 Camera | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Back camera (main camera) | (triple camera) 64 megapixels 13MP ultrawide f/2.4125°11mm 5MP macro f/2.0 | (quad camera) 13 megapixels 5MP ultrawide f/2.2115°1/5.0"1.12µm 2MP macro f/2.41.75μm 2MP depth f/2.41.75μm |
| Main camera resolution | 10120x6328 pixels | 4128x3096 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
| Focal length | 26mm lens | 27mm lens |
| Sensor size | 1/1.72" inches | 1/3.1" inches |
| Pixel size | 0.8µm pixel | 1.12µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection 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, Smile detection |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo on both cameras | HDR photo on both cameras |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Front camera (secondary) | 24 megapixels | 8 megapixels |
| Front camera resolution | 5632x4224 pixels | 3264x2448 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.0 (aperture) |
| Focal length | 27mm lens | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | 0.9µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| USB | USB 3.1 Type-C, USB OTG On-The-Go | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | Type-C jack with 3.5mm jack adapter | 3.5mm jack |
| TV output | USB Type-C (reversible) | USB Type-C (reversible) |
| Bluetooth | 5.1 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, QZSS | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (side-mounted) Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 6000 mAh | 4000 mAh |
| Charger, watts | 30W Wired fast charging 10W Reverse charging by cable Quick Charge 3/4 USB Power Delivery 3.0 | 10W (5V/2A) Wired charging |
| Inductive / wireless charging | Not supported | Not supported |
| Talk time autonomy | feature not registered | 16 hours |
| Standby | feature not registered | 180 hours (7.5 days) |
➕ Other features | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), 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, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black glare • ROG UI (Republic Of Gamers) • Always-On display • DTS:X stereo speakers (2 amplifiers) • 24-bit/192kHz audio • AeroActive Cooler 3 | • Colors: Titan, Green, Red • Silicon case included • LG 3D Sound Engine |
☢️ Radiation rate | ||
| Asus ROG Phone 3 (512GB/16GB) | LG K42 (K420HMW) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.74W/kg (head), 1.5W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |