Asus ROG Phone 5 Ultimate vs LG K40 (X420EMW)
Side by side comparison between Asus ROG Phone 5 Ultimate vs LG K40 phones, differences, pros, cons and full specifications. What's the better?
,
6.78"
AMOLED
AMOLED
1080x2448
64
MP
MP
24mp
18GB
RAM
RAM
Octa-core
6000
mAh
mAh
(Non removable)
vs
5.7"
IPS
IPS
720x1440
16
MP
MP
8mp
2GB
RAM
RAM
Octa-core
3000
mAh
mAh
(Non removable)
What's the better phone? Asus ROG Phone 5 Ultimate
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!
28 Advantages 
6 Advantages | 16 Common items in both devices |
| Only digital zoom |
| PDAF: phase detection autofocus |
| EIS: Digital stabilization |
| HDR photo/video on both cameras / HDR photo on both cameras |
| Capacitive |
| Multitouch |
| Accelerometer |
| +9 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 5 Ultimate | LG K40 (X420EMW) | |
| Change model | ||
| Model | ROG Phone 5 Ultimate | K40 (X420EMW) |
| Other model names | ROG Phone 5 Ultimate ZS673KS-18G512G-WH2, 1B059EU, 1B063IN | LG K40 LMX420EMW NFC Dual-sim, LM-X420EMW, LG-LMX420EMW |
| Country or region available |  (Global, International) |  (Global, International), (Europe) |
| Brand | Asus | LG |
| Release date | 6/7/2021, Announced: 3/10/2021 | 3/31/2019 |
| Depth | 9.9 millimeters (0.39 inches) | 8.3 millimeters (0.33 inches) |
| Size (width x height) | 77 x 173 millimeters (3.03 x 6.81 in) | 71.9 x 153 millimeters (2.83 x 6.02 in) |
| Weight | 239 grams (8.37 ounces) | 145 grams (5.08 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 5 Ultimate | LG K40 (X420EMW) | |
| Display type | AMOLED | TFT IPS LCD |
| Screen size | 6.78" inches | 5.7" inches |
| Screen-to-body ratio | ~82.2% (screen-to-body ratio) | ~76.2% (screen-to-body ratio) |
| Display resolution | 1080x2448 pixels | 720x1440 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 395 PPI | 282 PPI |
| Colors | 1 billion | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Not supported |
| Refresh rate | 144Hz | feature not registered |
| Display features | 800nits[typ] HDR10+ | feature not registered |
🤖 Operating System | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| System version | Android 11 | Android 8.1 Oreo |
| Firmware update | Android 12 | feature not registered |
| User Interface | ROG UI | feature not registered |
⚙️ Processor | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Chipset | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) | 64bit: MediaTek Helio P22 (MT6762) (12nm) |
| CPU | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (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 660 (840MHz) | PowerVR GE8320 (650MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| RAM memory | 18GB LPDDR5 | 2GB LPDDR3 |
| Internal storage | 512GB (475GB available) UFS 3.1 | 32GB (20GB available) eMMC 5.1 |
| External storage | Not supported | Until 1TB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| 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 | 2000/1024 Mbps | 300/50 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 | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 800/850/900/1700/1900/2100 | UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat20 (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) VoLTE | LTE Cat6 (Bands 1, 3, 5, 7, 8, 20) TD-LTE (Bands 38) |
| Primary 5G network | SA/NSA (1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 38, 40, 41, 66, 71, 77, 78, 79) | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 800/850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (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) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE |
📷 Camera | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Back camera (main camera) | (triple camera) 64 megapixels 13MP ultrawide f/2.411mm125° 5MP macro f/2.0 | 16 megapixels |
| Main camera resolution | 10120x6328 pixels | 4608x3456 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED flash | LED flash on both cameras |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | 26mm lens | feature not registered |
| Sensor size | 1/1.73" inches | 1/3" inches |
| Pixel size | 0.8µm pixel | 1µm 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 | Supported | Not supported |
| HDR | HDR photo/video on both cameras | HDR photo on both cameras |
| Camera extras | 4K@30/60/120fps 1080p@30/60/120/240fps 720p@480fps Sony IMX686 sensor | feature not registered |
📸 Front camera | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Front camera (secondary) | 24 megapixels | 8 megapixels |
| Front camera resolution | 5632x4224 pixels | 3264x2448 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | Full HD (1920x1080) |
| Front flash | Not supported | LED |
| Focal aperture | f/2.5 (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 5 Ultimate | LG K40 (X420EMW) | |
| Loudspeaker | Stereo sound with dual speakers 24-bit/192kHz Dirac HD | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | Not supported |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| USB | USB 3.1 Type-C, USB OTG On-The-Go | MicroUSB 2.0, USB OTG On-The-Go |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | USB Type-C (reversible) | Not supported |
| Bluetooth | 5.2 + A2DP/LE | 5.0 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC | A-GPS, GeoTagging |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Fingerprint sensor (rear-mounted) Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 6000 mAh | 3000 mAh |
| Charger, watts | 65W Wired fast charging 10W Reverse charging by cable Quick Charge 5 USB Power Delivery 3.0 | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | feature not registered | 8 hours |
| Standby | feature not registered | 100 hours (4.2 days) |
➕ Other features | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| 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: Storm White • AirTrigger 5: physical gaming triggers • Aero case • AeroActive Cooler 5 • LED display on the back with notifications and animations | • Colors: Black, Moroccan Blue, Platinum Gray • 18:9 ratio FullVision display • LED notification • DTS-X Surround sound |
☢️ Radiation rate | ||
| Asus ROG Phone 5 Ultimate | LG K40 (X420EMW) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |