LG X400 (K121S) vs ZTE Tempo X (N9137)
Side by side comparison between LG X400 vs ZTE Tempo X phones, 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
What's the better phone? LG X400 (K121S)
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 
0 Advantage | 20 Common items in both devices |
| 142 grams (4.97 ounces) |
| TFT IPS LCD |
| 16 million |
| LED flash |
| Only digital zoom |
| Autofocus |
| EIS: Digital stabilization |
| +13 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 (K121S) | ZTE Tempo X (N9137) | |
| Model | X400 (K121S) | Tempo X (N9137) |
| Other model names | SKT LG X400, LGM-K121S, LGMK121S (SK Telecom) | Boost Mobile ZTE Tempo X, Virgin Mobile ZTE N9137 |
| Country or region available |  South Korea |  USA |
| Brand | LG | ZTE |
| Release date | 2/1/2017 | 9/1/2017 |
| Depth | 8 millimeters (0.31 inches) | 9.1 millimeters (0.36 inches) |
| Size (width x height) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) | 71.9 x 145.5 millimeters (2.83 x 5.73 in) |
| Weight | 142 grams (4.97 ounces) | 142 grams (4.97 ounces) |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Display type | TFT IPS LCD | TFT IPS LCD |
| Screen size | 5.3" inches | 5" inches |
| Screen-to-body ratio | ~69.2% (screen-to-body ratio) | ~65.9% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels | 480x854 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 277 PPI | 196 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 | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| System version | Android 7.0 Nougat | Android 7.1.1 Nougat |
| Firmware update | Android 8.0 Oreo | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Chipset | 64bit: MediaTek MT6750 (28nm) | 32bit: Qualcomm Snapdragon 210 MSM8909 (28nm) |
| CPU | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core) | Quad-core, 1 processor: 4x 1.1GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | ARM Mali-T860 MP2 520Mhz | Qualcomm Adreno 304 |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| RAM memory | 2GB LPDDR3 | 1GB LPDDR3 |
| Internal storage | 32GB (22GB available) | 8GB (3GB available) |
| External storage | Until 256GB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 300/50 Mbps | 150/50 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G, 4G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Tri-Band 900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 900/1800/1900 | CDMA 800/1900, GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 2100 | CDMA2000 EV-DO RevA UMTS 850/1700/1900 |
| Primary 4G network | LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE | LTE Cat4 700/850/1700/1900 (Bands 2,4,5,12,13,25,26) TD-LTE 2500 (Bands 41) |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE |
| 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 (K121S) | ZTE Tempo X (N9137) | |
| Back camera (main camera) | 13 megapixels | 5 megapixels |
| Main camera resolution | 4160x3120 pixels | 2560x1920 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | HD (1280x720) 30 fps |
| Flash | LED flash | LED flash |
| 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 | 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 | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Front camera (secondary) | 5 megapixels | 2 megapixels |
| Front camera resolution | 2560x1920 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | VGA (640x480) |
| 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 (K121S) | ZTE Tempo X (N9137) | |
| Loudspeaker | Supported | Supported |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | FM (RDS) | Not supported |
| TV | Digital TV | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, OGG, eAAC+ |
🔌 Connectivity | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Not supported |
| Bluetooth | 4.2 + A2DP | 4.1 + 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 | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Removable) |
| Battery capacity | 2800 mAh | 2200 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | feature not registered |
| Talk time autonomy | 9 hours | 15 hours |
| Standby | 390 hours (16.3 days) | feature not registered |
➕ Other features | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| Call control | Voice dialing, Voice recorder | 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: Black, Gold • 2.5D Arc Glass screen • LG UX 5.0 • Wide-angle 120° front camera • KnockOn, Knock Code • DMB-TV (Korea) | • Colors: Black |
☢️ Radiation rate | ||
| LG X400 (K121S) | ZTE Tempo X (N9137) | |
| 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 |