LG X400 (K121K) vs Xiaomi Watch Color
Side by side comparison between LG X400 vs Xiaomi Watch Color devices, differences, pros, cons and full specifications. What's the better?
,
5.3"
IPS
IPS
720x1280
13
MP
MP
5mp
2GB
RAM
RAM
Octa-core
2800
mAh
mAh
(Removable)
vs
1.39"
AMOLED
AMOLED
454x454
N/A
512MB
RAM
RAM
Single-core
420
mAh
mAh
(Non removable)
What's the better device? LG X400 (K121K)
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!
21 Advantages 
10 Advantages | 8 Common items in both devices |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| Compass |
| A-GPS, GeoTagging, GLONASS |
| 802.11 b/g/n [wifi4] |
| + 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 X400 (K121K) | Xiaomi Watch Color | |
| Model | X400 (K121K) | Watch Color |
| Other model names | KT LG X400, LGM-K121K, LGMK121K (Korea Telecom) | Xiaomi Mi Watch Color XMWT06 |
| Country or region available |  South Korea |  China |
| Brand | LG | Xiaomi |
| Release date | 2/1/2017 | 1/3/2020 |
| Depth | 8 millimeters (0.31 inches) | 11.4 millimeters (0.45 inches) |
| Size (width x height) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) | 46.2 x 53.3 millimeters (1.82 x 2.1 in) |
| Weight | 142 grams (4.97 ounces) | 42 grams (1.47 ounces) |
| Build, materials | Plastic body, glass front | Stainless steel and plastic body, glass front |
| Protection against water and others | Not supported | 5 ATM: 50 meters waterproof |
📲 Display | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Display type | TFT IPS LCD | AMOLED |
| Screen size | 5.3" inches | 1.39" inches |
| Screen-to-body ratio | ~69.2% (screen-to-body ratio) | ~25.3% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels | 454x454 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 277 PPI | 462 PPI |
| Colors | 16 million | 260 thousand |
| 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 X400 (K121K) | Xiaomi Watch Color | |
| System version | Android 7.0 Nougat | Proprietary OS |
| Firmware update | Android 8.0 Oreo | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Chipset | 64bit: MediaTek MT6750 (28nm) | 32bit |
| CPU | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core) | Single-core, 1 processor: Single-core |
| GPU graphical controller | ARM Mali-T860 MP2 520Mhz | 3D GPU |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| RAM memory | 2GB LPDDR3 | 512MB |
| Internal storage | 32GB (22GB available) | 2GB (512MB available) eMCP |
| External storage | Until 256GB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | Not supported |
| Maximum Download / Upload | 300/50 Mbps | feature not registered |
| Network technology | 2G, 3G, 4G | feature not registered |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Tri-Band 900/1800/1900 | Not supported |
| Primary 2G network | GSM 900/1800/1900 | Not supported |
| Primary 3G network | UMTS 2100 | Not supported |
| Primary 4G network | LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A | Not supported |
| 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 X400 (K121K) | Xiaomi Watch Color | |
| Back camera (main camera) | 13 megapixels | Not supported |
| Main camera resolution | 4160x3120 pixels | Not supported |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Not supported |
| Flash | LED flash | Not supported |
| Focal aperture | f/2.2 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Autofocus | Autofocus | Not supported |
| Touch focus | Supported | Not supported |
| Image stabilization | EIS: Digital stabilization | Not supported |
| Zoom | Only digital zoom | Not supported |
| Face/smile detection | Face detection, Smile detection | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo only main camera | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Front camera (secondary) | 5 megapixels | Not supported |
| Front camera resolution | 2560x1920 pixels | Not supported |
| Video recording (secondary) | Full HD (1920x1080) | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.4 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/5" inches | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Loudspeaker | Supported | feature not registered |
| Active noise cancellation | 2 microphones or more | Not supported |
| Radio | FM (RDS) | Not supported |
| TV | Digital TV | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | feature not registered |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, eAAC+ |
🔌 Connectivity | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | Not supported |
| Audio output | 3.5mm jack | Not supported |
| TV output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 5.0 + A2DP/LE |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Barometer Compass Gyroscope Heart rate Pedometer |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Non removable) 5V/0.5A |
| Battery capacity | 2800 mAh | 420 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 9 hours | feature not registered |
| Standby | 390 hours (16.3 days) | 336 hours (14 days) |
➕ Other features | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| Call control | Voice dialing, Voice recorder | Not supported |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS, E-mail |
| Hands-free calling | Supported | Not supported |
| Video calling | Supported | Not supported |
| Ringtones | Polyphonic and customized | feature not registered |
| Web browser | HTML, XHTML, HTML5 | Not supported |
| Antenna | Internal antenna | feature not registered |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Black, Gold • 2.5D Arc Glass screen • LG UX 5.0 • Wide-angle 120° front camera • KnockOn, Knock Code • DMB-TV (Korea) | • Colors: Black, Silver • Silicon straps colors: many • Straps compatible: 22mm • Dock charger included • Languages: Chinese • Compatible with Android 4.4, iOS 9 and above |
☢️ Radiation rate | ||
| LG X400 (K121K) | Xiaomi Watch Color | |
| 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 |