Xiaomi Mix 4 (256GB/12GB) vs LG K31 Rebel (L355DL)
Side by side comparison between Xiaomi Mix 4 vs LG K31 phones, differences, pros, cons and full specifications. What's the better?
,
6.67"
AMOLED
AMOLED
1080x2400
108
MP
MP
20mp
12GB
RAM
RAM
Octa-core
4500
mAh
mAh
(Non removable)
vs
5.7"
IPS
IPS
720x1520
13
MP
MP
5mp
2GB
RAM
RAM
Octa-core
3000
mAh
mAh
(Non removable)
What's the better phone? Xiaomi Mix 4 (256GB/12GB)
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!
37 Advantages 
5 Advantages | 12 Common items in both devices |
| LDAF/PDAF: laser/phase detection autofocus / PDAF: phase detection autofocus |
| HDR photo/video on both cameras / HDR photo on both cameras |
| (front) Full HD (1920x1080) |
| Capacitive |
| Multitouch |
| Accelerometer |
| Fingerprint sensor (under display) / Fingerprint sensor (rear-mounted) |
| +5 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 | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Model | Mix 4 (256GB/12GB) | K31 Rebel (L355DL) |
| Other model names | 小米MIX 4 2106118C (12GB RAM) | LG K31 Rebel (TracFone), LGL355DLATRFTNY, LGL355DL |
| Country or region available |  (Global, International) |  USA |
| Brand | Xiaomi | LG |
| Release date | 8/16/2021, Announced: 8/10/2021 | 8/21/2020 |
| Depth | 8 millimeters (0.31 inches) | 8.6 millimeters (0.34 inches) |
| Size (width x height) | 75.35 x 162.65 millimeters (2.97 x 6.4 in) | 71.12 x 147.83 millimeters (2.8 x 5.82 in) |
| Weight | 225 grams (7.88 ounces) | 146 grams (5.11 ounces) |
| Build, materials | Aluminum body, glass front, ceramic back | Plastic body, glass front |
| Protection against water and others | IP53 certified: protection against dust and splashing | MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. |
📲 Display | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Display type | AMOLED | TFT IPS LCD |
| Screen size | 6.67" inches | 5.7" inches |
| Screen-to-body ratio | ~87.6% (screen-to-body ratio) | ~77.1% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 720x1520 pixels (19:9) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 395 PPI | 295 PPI |
| Colors | 1 billion | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Panda King Glass |
| Refresh rate | 120Hz | 60Hz |
| Display features | Dolby Vision/HDR10+ Touch Sampling Rate: 480Hz | Not supported |
🤖 Operating System | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| System version | Android 11 | Android 10 |
| Firmware update | Android 13 | feature not registered |
| User Interface | MIUI 12.5 / 13 | feature not registered |
⚙️ Processor | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Chipset | 64bit: Qualcomm Snapdragon 888+ (SM8350-AC) (5nm) | 64bit: MediaTek Helio P22 (MT6762) (12nm) |
| CPU | Octa-core, 3 processors: 1x 3GHz 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) | AnTuTu: 798010 (v9) | feature not registered |
💽 Memory and storage | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| RAM memory | 12GB LPDDR5 | 2GB LPDDR3 |
| Internal storage | 256GB (218GB available) UFS 3.1 | 32GB (18GB available) eMMC 5.1 |
| External storage | Not supported | Until 512GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 2000/1024 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 | CDMA 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO UMTS 850/900/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28) TD-LTE (34, 38, 39, 40, 41, 42) VoLTE | LTE Cat4 (2, 4, 5, 12, 13, 25, 26, 66, 71) TD-LTE (41) |
| Primary 5G network | SA/NSA/Sub6 (1, 3, 5, 8, 28, 41, 77, 78, 79) | Not supported |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28) TD-LTE (34, 38, 39, 40, 41, 42) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | Not supported |
📷 Camera | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Back camera (main camera) | (triple camera) 108 megapixels 13MP ultrawide f/2.212mm123°1/3.06"1.12µm 8MP periscope telephoto f/4.1120mmPDAFOIS5x-optical-zoom | (dual camera) 13 megapixels 5MP ultrawide f/2.2120°1/5.0"1.12µm |
| Main camera resolution | 12000x9000 pixels | 4128x3096 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 24 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/1.9 (aperture) | f/1.8 (aperture) |
| Focal length | 24mm lens | 27mm lens |
| Sensor size | 1/1.33" inches | 1/3.1" inches |
| Pixel size | 0.8µm pixel | 1.12µm pixel |
| Autofocus | LDAF/PDAF: laser/phase detection autofocus | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | EIS: Digital stabilization |
| Zoom | Digital and optical 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@30/60fps 1080p@30/60/120/480fps | feature not registered |
📸 Front camera | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Front camera (secondary) | 20 megapixels | 5 megapixels |
| Front camera resolution | 5184x3840 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/3.4 (aperture) | f/2.2 (aperture) |
| Focal length | 27mm lens | 24mm lens |
| Sensor size | 1/0.8" inches | 1/5" inches |
| Pixel size | 0.8µm pixel | 1.12µm pixel |
🔉 Sound and multimedia | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Loudspeaker | Stereo sound 24-bit/192kHz Tuned by Harman Kardon | 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.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | Type-C jack with 3.5mm jack adapter | 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 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Sensors | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Heart rate Proximity sensor UWB (Ultra Wideband) | Accelerometer Fingerprint sensor (rear-mounted) |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 4500 mAh | 3000 mAh |
| Charger, watts | 120W Wired fast charging Reverse charging by cable Quick Charge 4 USB Power Delivery 3.0 | Wired charging |
| Inductive / wireless charging | 50W Qi wireless charging 10W Reverse wireless charging | Not supported |
| Talk time autonomy | feature not registered | 11 hours |
| Standby | feature not registered | 528 hours (22 days) |
➕ Other features | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| 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: Ceramic Black, Ceramic White, Shadow Gray • Silicone case included • Screen protector included | • Colors: Silver • LG UX 9.1 |
☢️ Radiation rate | ||
| Xiaomi Mix 4 (256GB/12GB) | LG K31 Rebel (L355DL) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.61W/kg (head), 1.13W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | feature not registered |