LG X400 (K121K) All specs

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Full specifications phone: LG X400 (K121K) specs, detailed technical information, features, price and review. All about this phone.

4/29/2017 9:07 PM, updated: 3/15/2020 3:00 PM

LG X400 (K121K)

The LG X400 (K121K) is a good Android phone with 1.5GHz Octa-core processor that allows run games and heavy applications.

With one SIM card slot, the LG X400 (K121K) allows download up to 300 Mbps for internet browsing, but it also depends on the carrier.

Great connectivity of this device includes Bluetooth 4.2 + A2DP, WiFi 802.11 b/g/n [wifi4] (2.4GHz) and NFC to make mobile payments or connection to other devices.

Including the battery, the LG X400 (K121K) phone has 142 grams and it's a very thin device, only 8mm.

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Summary

⚙️ CPU: MediaTek MT6750 (28nm)

🤖 Android 7.0
🔄 Android 8.0

📱 5.3"
TFT IPS LCD

🔳 RAM: 2GB
💽 ROM: 32GB

🔌 WIFI4, BT4.2, FM, NFC

📷 (back) 13MP
🤳 (front) 5MP

🔋 2800mAh

📱 Model features
	LG X400 (K121K)
Change model
Model	X400 (K121K)
Other model names	KT LG X400, LGM-K121K, LGMK121K (Korea Telecom)
Country or region available	South Korea
Brand	LG
Release date	2/1/2017
Depth	8 millimeters (0.31 inches)
Size (width x height)	75.29 x 148.7 millimeters (2.96 x 5.85 in)
Weight	142 grams (4.97 ounces)
Build, materials	Plastic body, glass front
Protection against water and others	Not supported
📲 Display
	LG X400 (K121K)
Display type	TFT IPS LCD
Screen size	5.3" inches
Screen-to-body ratio	~69.2% (screen-to-body ratio)
Display resolution	720x1280 pixels
Touchscreen	Capacitive Multitouch
Pixel density (dot pitch)	277 PPI
Colors	16 million
Scratch-resistant glass	Not supported
Refresh rate	feature not registered
Display features	feature not registered
🤖 Operating System
	LG X400 (K121K)
System version	Android 7.0 Nougat
Firmware update	Android 8.0 Oreo
User Interface	feature not registered
⚙️ Processor
	LG X400 (K121K)
Chipset	64bit: MediaTek MT6750 (28nm)
CPU	Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	ARM Mali-T860 MP2 520Mhz
Performance (benchmark)	feature not registered
💽 Memory and storage
	LG X400 (K121K)
RAM memory	2GB LPDDR3
Internal storage	32GB (22GB available)
External storage	Until 256GB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	LG X400 (K121K)
Dual-SIM	Not supported
SIM card	1 slot (Single-SIM) nano-SIM (4FF)
Maximum Download / Upload	300/50 Mbps
Network technology	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Tri-Band 900/1800/1900
Primary 2G network	GSM 900/1800/1900
Primary 3G network	UMTS 2100
Primary 4G network	LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE
Primary 5G network	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A
Secondary 2G network	Not supported
Secondary 3G network	Not supported
Secondary 4G network	Not supported
Secondary data network	Not supported
📷 Camera
	LG X400 (K121K)
Back camera (main camera)	13 megapixels
Main camera resolution	4160x3120 pixels
Video recording (primary)	Full HD (1920x1080) 30 fps
Flash	LED flash
Focal aperture	f/2.2 (aperture)
Focal length	feature not registered
Sensor size	1/3" inches
Pixel size	1.12µm pixel
Autofocus	Autofocus
Touch focus	Supported
Image stabilization	EIS: Digital stabilization
Zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection
BSI sensor	Not supported
HDR	HDR photo only main camera
Camera extras	feature not registered
📸 Front camera
	LG X400 (K121K)
Front camera (secondary)	5 megapixels
Front camera resolution	2560x1920 pixels
Video recording (secondary)	Full HD (1920x1080)
Front flash	Not supported
Focal aperture	f/2.4 (aperture)
Focal length	feature not registered
Sensor size	1/5" inches
Pixel size	1.12µm pixel
🔉 Sound and multimedia
	LG X400 (K121K)
Loudspeaker	Supported
Active noise cancellation	2 microphones or more
Radio	FM (RDS)
TV	Digital TV
Video formats	MP4, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	LG X400 (K121K)
USB	MicroUSB 2.0, USB OTG On-The-Go
Audio output	3.5mm jack
TV output	Not supported
Bluetooth	4.2 + A2DP
WiFi	802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot
DLNA	Not supported
GPS	A-GPS, GeoTagging, GLONASS
NFC	Supported
Infrared port	Not supported
🧭 Sensors
	LG X400 (K121K)
Sensors	Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor
Vibrating alert	Supported
🔋 Battery
	LG X400 (K121K)
Battery type	Li-Ion: lithium-ion (Removable)
Battery capacity	2800 mAh
Charger, watts	Wired charging
Inductive / wireless charging	feature not registered
Talk time autonomy	9 hours
Standby	390 hours (16.3 days)
➕ Other features
	LG X400 (K121K)
Call control	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported
Video calling	Supported
Ringtones	Polyphonic and customized
Web browser	HTML, XHTML, HTML5
Antenna	Internal antenna
Qwerty physical keyboard	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)
☢️ Radiation rate
	LG X400 (K121K)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered