LG X400 (K121K) vs ZTE Grand S (3G)
Side by side comparison between LG X400 vs ZTE Grand S 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
5"
IPS
IPS
1080x1920
13
MP
MP
2mp
2GB
RAM
RAM
Quad-core
1780
mAh
mAh
(Non removable)
What's the better phone? 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!
15 Advantages 
7 Advantages | 27 Common items in both devices |
| 2GB LPDDR3 |
| Plastic body, glass front |
| TFT IPS LCD |
| 16 million |
| (back) 13MP |
| LED flash |
| Only digital zoom |
| +20 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) | ZTE Grand S (3G) | |
| Model | X400 (K121K) | Grand S (3G) |
| Other model names | KT LG X400, LGM-K121K, LGMK121K (Korea Telecom) | AT&T ZTE Grand S 3G+, ZTE Grand S HSPA+, ZTE Athena |
| Country or region available |  South Korea |  USA |
| Brand | LG | ZTE |
| Release date | 2/1/2017 | 3/1/2013 |
| Depth | 8 millimeters (0.31 inches) | 6.9 millimeters (0.27 inches) |
| Size (width x height) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) | 70 x 142 millimeters (2.76 x 5.59 in) |
| Weight | 142 grams (4.97 ounces) | 110 grams (3.85 ounces) |
| Build, materials | Plastic body, glass front | Plastic body, glass front |
| Protection against water and others | Not supported | Not supported |
📲 Display | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| 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) | ~69.3% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels | 1080x1920 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 277 PPI | 441 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass |
| Refresh rate | feature not registered | 60Hz |
| Display features | feature not registered | Not supported |
🤖 Operating System | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| System version | Android 7.0 Nougat | Android 4.1.2 Jelly Bean |
| Firmware update | Android 8.0 Oreo | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| Chipset | 64bit: MediaTek MT6750 (28nm) | 32bit: Qualcomm Snapdragon 600 (APQ8064M) (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 1.7GHz Krait 300 (Quad-core) |
| GPU graphical controller | ARM Mali-T860 MP2 520Mhz | Qualcomm Adreno 320 (400MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| RAM memory | 2GB LPDDR3 | 2GB LPDDR3 |
| Internal storage | 32GB (22GB available) | 16GB (13GB available) |
| External storage | Until 256GB microSD, microSDXC (dedicated slot) | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| Dual-SIM | Not supported | Not supported |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) Standard mini-SIM (2FF) |
| Maximum Download / Upload | 300/50 Mbps | 42/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| 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 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 2100 | UMTS 850/1900 |
| 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 | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ |
| 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) | ZTE Grand S (3G) | |
| Back camera (main camera) | 13 megapixels | 13 megapixels |
| Main camera resolution | 4160x3120 pixels | 4128x3096 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 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 | Not supported |
| Camera extras | feature not registered | feature not registered |
📸 Front camera | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| Front camera (secondary) | 5 megapixels | 2 megapixels |
| Front camera resolution | 2560x1920 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| 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) | ZTE Grand S (3G) | |
| Loudspeaker | Supported | Mono sound (not stereo) Dolby Mobile sound |
| Active noise cancellation | 2 microphones or more | 2 microphones |
| Radio | FM (RDS) | FM |
| TV | Digital TV | Not supported |
| Video formats | MP4, H.264, H.263, XviD, MKV | MP4, H.264, H.263, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+ |
🔌 Connectivity | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | Not supported | Micro-B USB MHL |
| Bluetooth | 4.2 + A2DP | 4.0 + A2DP |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 a/b/g/n [wifi4] (2.4GHz, 5GHz) WiFi hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 2800 mAh | 1780 mAh |
| Charger, watts | Wired charging | Wired charging |
| Inductive / wireless charging | feature not registered | Not supported |
| Talk time autonomy | 9 hours | feature not registered |
| Standby | 390 hours (16.3 days) | feature not registered |
➕ Other features | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| 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: Silver, Red, Blue, White Java framework |
☢️ Radiation rate | ||
| LG X400 (K121K) | ZTE Grand S (3G) | |
| 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 |