Alcatel Idol 4 (6055K) vs LG X400 (K121K)
Side by side comparison between Alcatel Idol 4 vs LG X400 phones, differences, pros, cons and full specifications. What's the better?
,
5.2"
IPS
IPS
1080x1920
13
MP
MP
8mp
3GB
RAM
RAM
Octa-core
2610
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? Alcatel Idol 4 (6055K)
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!
11 Advantages 
8 Advantages | 26 Common items in both devices |
| Until 256GB microSD, microSDXC |
| TFT IPS LCD |
| 16 million |
| (back) 13MP |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| EIS: Digital stabilization |
| +19 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 | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Model | Idol 4 (6055K) | X400 (K121K) |
| Other model names | Alcatel IDOL 4 Dual-Sim 3GB RAM, Alcatel 6055K, OT-6055K | KT LG X400, LGM-K121K, LGMK121K (Korea Telecom) |
| Country or region available |  (Europe) |  South Korea |
| Brand | Alcatel | LG |
| Release date | 3/1/2016 | 2/1/2017 |
| Depth | 7.1 millimeters (0.28 inches) | 8 millimeters (0.31 inches) |
| Size (width x height) | 72.5 x 147 millimeters (2.85 x 5.79 in) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) |
| Weight | 135 grams (4.73 ounces) | 142 grams (4.97 ounces) |
| Build, materials | feature not registered | Plastic body, glass front |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 5.2" inches | 5.3" inches |
| Screen-to-body ratio | ~69.9% (screen-to-body ratio) | ~69.2% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 424 PPI | 277 PPI |
| Colors | 16 million | 16 million |
| 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 | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| System version | Android 6.0.1 Marshmallow | Android 7.0 Nougat |
| Firmware update | feature not registered | Android 8.0 Oreo |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Chipset | 64bit: Qualcomm Snapdragon 617 MSM8952 (28nm) | 64bit: MediaTek MT6750 (28nm) |
| CPU | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1.2GHz ARM Cortex-A53 (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 405 550Mhz | ARM Mali-T860 MP2 520Mhz |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| RAM memory | 3GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 16GB (10GB available) eMMC 5.1 | 32GB (22GB available) |
| External storage | Until 256GB microSD, microSDXC (hybrid slot/shares the same SIM-2 slot) | Until 256GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card (hybrid slot/shares the same microSD slot) | Not supported |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 150/50 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 850/900/1900/2100 | UMTS 2100 |
| Primary 4G network | LTE Cat4 700/800/900/1800/2100/2600 (Bands 1,3,7,8,20,28) | 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+, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
📷 Camera | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Back camera (main camera) | 13 megapixels | 13 megapixels |
| Main camera resolution | 4128x3096 pixels | 4160x3120 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED on main camera and LED on front camera | LED flash |
| Focal aperture | f/2.0 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/3" inches | 1/3" inches |
| Pixel size | 1.12µm 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 | Not supported | Not supported |
| HDR | HDR photo only main camera | HDR photo only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Front camera (secondary) | 8 megapixels | 5 megapixels |
| Front camera resolution | 3264x2448 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | LED | Not supported |
| Focal aperture | feature not registered | f/2.4 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/5" inches |
| Pixel size | 1.12µm pixel | 1.12µm pixel |
🔉 Sound and multimedia | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM (RDS) | FM (RDS) |
| TV | Not supported | Digital TV |
| Video formats | MP4, H.265, H.264, H.263, XviD | MP4, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, AAC+ | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| 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 | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 a/b/g/n [wifi4] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Sensors | Accelerometer Ambient light sensor Compass Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Battery type | Li-Ion: lithium-ion (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 2610 mAh | 2800 mAh |
| Charger, watts | 18W Wired fast charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 15 hours | 9 hours |
| Standby | 720 hours (30 days) | 390 hours (16.3 days) |
➕ Other features | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder |
| Messaging | SMS (iTap), 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: Gold, Dark Gray, Silver, Rose Gold • USB OTG On-The-Go • LED notification (white light) • Oleophobic coating • Glass back panel • JBL earphones • Hi-Fi 3.6W dual-stereo • Front camera: Wide Angle 84° • Quick Charge 2.0 • Fast battery charging: 60% in 30min • Reversible phone • VR goggles compatible | • 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 | ||
| Alcatel Idol 4 (6055K) | LG X400 (K121K) | |
| 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 |