Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) vs LG X400 (K121L)
Side by side comparison between Asus Zenfone Max Pro (M2) vs LG X400 phones, differences, pros, cons and full specifications. What's the better?
,
6.26"
IPS
IPS
1080x2280
12
MP
MP
13mp
6GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
vs
5.3"
IPS
IPS
720x1280
13
MP
MP
5mp
2GB
RAM
RAM
Octa-core
2800
mAh
mAh
(Removable)
What's the better phone? Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB)
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!
22 Advantages 
4 Advantages | 27 Common items in both devices |
| Plastic body, glass front |
| TFT IPS LCD |
| 16 million |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| EIS: Digital stabilization |
| HDR photo only main camera |
| +20 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 Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Model | Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | X400 (K121L) |
| Other model names | Asus Zenfone Max Pro M2 ZB631KL (6GB RAM), X01BDA | LG U+ X400, LGM-K121L, LGMK121L (LG Uplus) |
| Country or region available |  (Global, International) |  South Korea |
| Brand | Asus | LG |
| Release date | 12/1/2018 | 2/1/2017 |
| Depth | 8.5 millimeters (0.33 inches) | 8 millimeters (0.31 inches) |
| Size (width x height) | 75.5 x 157.9 millimeters (2.97 x 6.22 in) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) |
| Weight | 175 grams (6.13 ounces) | 142 grams (4.97 ounces) |
| Build, materials | Plastic body, glass front | Plastic body, glass front |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 6.26" inches | 5.3" inches |
| Screen-to-body ratio | ~82% (screen-to-body ratio) | ~69.2% (screen-to-body ratio) |
| Display resolution | 1080x2280 pixels (19:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 403 PPI | 277 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 6 | Not supported |
| Refresh rate | 60Hz | feature not registered |
| Display features | 450nits[typ] | feature not registered |
🤖 Operating System | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| System version | Android 8.1 Oreo | Android 7.0 Nougat |
| Firmware update | Android 9.0 Pie | Android 8.0 Oreo |
| User Interface | ZenUI | feature not registered |
⚙️ Processor | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Chipset | 64bit: Qualcomm Snapdragon 660 (SDM660) (14nm) | 64bit: MediaTek MT6750 (28nm) |
| CPU | Octa-core, 2 processors: 4x 2.2GHz Kryo 260 Gold (Quad-core) 4x 1.8GHz Kryo 260 Silver (Quad-core) | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 512 (650MHz) | ARM Mali-T860 MP2 520Mhz |
| Performance (benchmark) | AnTuTu: 124039 (v7) Geekbench: 5169 (v4.4) GFXBench: 7.6fps (ES 3.1 onscreen) | feature not registered |
💽 Memory and storage | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| RAM memory | 6GB LPDDR4 | 2GB LPDDR3 |
| Internal storage | 64GB (51GB available) eMMC 5.1 | 32GB (22GB available) |
| External storage | Until 1TB microSD, microSDXC (dedicated slot) | Until 256GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (dedicated slot) | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 400/75 Mbps | 300/50 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 | Tri-Band 900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 900/1800/1900 |
| Primary 3G network | UMTS 850/900/2100 | UMTS 2100 |
| Primary 4G network | LTE Cat13 VoLTE Global version; LTE (1, 3, 5, 7, 8, 20) TD-LTE (40) America version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 28) TD-LTE (38, 41) | LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | UMTS 850/900/2100 | Not supported |
| Secondary 4G network | LTE Cat13 VoLTE Global version; LTE (1, 3, 5, 7, 8, 20) TD-LTE (40) America version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 28) TD-LTE (38, 41) | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | Not supported |
📷 Camera | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Back camera (main camera) | (dual camera) 12 megapixels 5MP depth f/2.4 | 13 megapixels |
| Main camera resolution | 4000x3000 pixels | 4160x3120 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash on both cameras | LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.2 (aperture) |
| Focal length | 27mm (lens) | feature not registered |
| Sensor size | 1/2.9" inches | 1/3" inches |
| Pixel size | 1.25µm pixel | 1.12µm pixel |
| 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, Smile detection |
| BSI sensor | Supported | Not supported |
| HDR | HDR photo only main camera | HDR photo only main camera |
| Camera extras | 1080p@30/60fps Sony IMX486 sensor | feature not registered |
📸 Front camera | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Front camera (secondary) | 13 megapixels | 5 megapixels |
| Front camera resolution | 4128x3096 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | LED | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.4 (aperture) |
| Focal length | 26mm (lens) | feature not registered |
| Sensor size | 1/3.1" inches | 1/5" inches |
| Pixel size | 1.12µm pixel | 1.12µm pixel |
🔉 Sound and multimedia | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Loudspeaker | Supported NXP amplifier | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM | FM (RDS) |
| TV | Not supported | Digital TV |
| 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 Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0, USB OTG On-The-Go |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Micro-B USB MHL | Not supported |
| Bluetooth | 5.0 + A2DP/LE | 4.2 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) 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, BeiDou, QZSS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 5000 mAh | 2800 mAh |
| Charger, watts | 10W (5V/2A) Wired charging | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | 45 hours (1.9 days) | 9 hours |
| Standby | 833.3 hours (34.7 days) | 390 hours (16.3 days) |
➕ Other features | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| 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: Blue, Titanium • Touch glove display | • Colors: Black, Gold • 2.5D Arc Glass screen • LG UX 5.0 • Wide-angle 120° front camera • KnockOn, Knock Code • DMB-TV (Korea) |
☢️ Radiation rate | ||
| Asus Zenfone Max Pro M2 (ZB631KL 64GB/6GB) | LG X400 (K121L) | |
| 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 |