LG G Flex (LS995) vs LG X400 (K121K)
Side by side comparison between LG G Flex vs LG X400 phones, differences, pros, cons and full specifications. What's the better?
,
6"
POLED
POLED
720x1280
13
MP
MP
2.1mp
2GB
RAM
RAM
Quad-core
3500
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? LG G Flex (LS995)
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!
12 Advantages 
11 Advantages | 25 Common items in both devices |
| 2GB LPDDR3 |
| 16 million |
| 720x1280 pixels |
| (back) 13MP |
| LED flash |
| Only digital zoom |
| Autofocus |
| +18 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 G Flex (LS995) | LG X400 (K121K) | |
| Model | LG G Flex (LS995) | X400 (K121K) |
| Other model names | Sprint LG G Flex LS995 4G LTE, LG Flex, LG LS995 | KT LG X400, LGM-K121K, LGMK121K (Korea Telecom) |
| Country or region available |  USA |  South Korea |
| Brand | LG | LG |
| Release date | 1/1/2014 | 2/1/2017 |
| Depth | 8.7 millimeters (0.34 inches) | 8 millimeters (0.31 inches) |
| Size (width x height) | 81.6 x 160.5 millimeters (3.21 x 6.32 in) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) |
| Weight | 177 grams (6.2 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 | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Display type | P-OLED | TFT IPS LCD |
| Screen size | 6" inches | 5.3" inches |
| Screen-to-body ratio | ~75.8% (screen-to-body ratio) | ~69.2% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 245 PPI | 277 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass 2 | Not supported |
| Refresh rate | feature not registered | feature not registered |
| Display features | feature not registered | feature not registered |
🤖 Operating System | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| System version | Android 4.2.2 Jelly Bean | Android 7.0 Nougat |
| Firmware update | feature not registered | Android 8.0 Oreo |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Chipset | 32bit: Qualcomm Snapdragon 800 MSM8974A | 64bit: MediaTek MT6750 (28nm) |
| CPU | Quad-core, 1 processor: 4x 2.26GHz Krait 400 (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 330 | ARM Mali-T860 MP2 520Mhz |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| RAM memory | 2GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 32GB (25GB available) | 32GB (22GB available) |
| External storage | Not supported | Until 256GB microSD, microSDXC (dedicated slot) |
📶 Mobile networks | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) micro-SIM (3FF) | 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 | CDMA 800/1900, GSM 850/900/1800/1900 | GSM 900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO, UMTS 850/1900/2100 | UMTS 2100 |
| Primary 4G network | LTE Cat4 800/1900/2500 | 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, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, LTE | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A |
| 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 G Flex (LS995) | LG X400 (K121K) | |
| Back camera (main camera) | 13 megapixels | 13 megapixels |
| Main camera resolution | 4128x3096 pixels | 4160x3120 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | feature not registered | f/2.2 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/3" inches |
| Pixel size | feature not registered | 1.12µm pixel |
| Autofocus | Autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | feature not registered | 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 only main camera | HDR photo only main camera |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Front camera (secondary) | 2.1 megapixels | 5 megapixels |
| Front camera resolution | 1920x1080 pixels | 2560x1920 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
| Front flash | Not supported | 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 | feature not registered | 1.12µm pixel |
🔉 Sound and multimedia | ||
| LG G Flex (LS995) | 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, DivX, XviD, H.264, H.263, WMV | MP4, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, AC3, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| USB | MicroUSB 3.0 | MicroUSB 2.0, USB OTG On-The-Go |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Micro-B USB SlimPort | Not supported |
| Bluetooth | 4.0 + A2DP | 4.2 + A2DP |
| WiFi | 802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot |
| DLNA | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS |
| NFC | Supported | Supported |
| Infrared port | Supported | Not supported |
🧭 Sensors | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Sensors | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| Battery type | LiPo: li-ion polymer (Non removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 3500 mAh | 2800 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 15 hours | 9 hours |
| Standby | 700 hours (29.2 days) | 390 hours (16.3 days) |
➕ Other features | ||
| LG G Flex (LS995) | LG X400 (K121K) | |
| 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: Titan silver • Curved body and display • Self-healing back panel coating • USB On-The-Go 1.3 • Dolby mobile sound enhancement • Java framework | • 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 | ||
| LG G Flex (LS995) | 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 |