Skip to content

LG X400 (K121S) vs Vivo X7 (128GB)

Side by side comparison between LG X400 vs Vivo X7 phones, differences, pros, cons and full specifications. What's the better?

,
LG X400 (K121S)
5.3"
IPS

720x1280

13
MP

5mp

2GB
RAM

64bit Octa

2800
mAh

(Removable)

vs
Vivo X7 (128GB)
5.2"
AMOLED

1080x1920

13
MP

16mp

4GB
RAM

64bit Octa

3000
mAh

(Non removable)

What's the better phone? Vivo X7 (128GB)

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!

X400 (K121S)9 Advantages LG X400 (K121S)vsX7 (128GB)12 Advantages Vivo X7 (128GB)
+142 grams (4.97 ounces)6%
Lighter
vs151 grams (5.29 ounces)
+5.3"2%
Larger screen
vs5.2"
+Android 8.0 OreoAdvantage
Android 8.0 Oreo is newer and safer
vsAndroid 5.1.1 Lollipop
+(4G+ LTE-A) 300 Mbps100%
Faster for surfing the internet and download files
vs(4G LTE) 150 Mbps
+Li-Ion: Lithium-Ion (Removable)Advantage
Removable battery can be replaced easily
vsLiPo: Li-Ion polymer (Non removable)
+FM (RDS)Advantage
The radio lets you listen to your songs and sports in general
vsNot supported
+Digital TVAdvantage
Watch your favorite TV shows anywhere
vsNot supported
+4.2 + A2DPAdvantage
Bluetooth 4.2 + A2DP is newer and faster
vs4.0 + A2DP
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
1.5GHz 64bit Octa-Corevs+1.8GHz 64bit Octa-Core34%
More powerful processor, you can open your applications faster
2GB LPDDR3vs+4GB LPDDR3100%
More RAM memory. Typically more responsive and better for multitasking.
32GB (22GB available)vs+128GB (116GB available)4 times
More internal storage for applications and files
8 millimeters (0.31 inches)vs+7.2 millimeters (0.28 inches)11%
Thinner
TFT IPS LCDvs+Super AMOLEDAdvantage
Super AMOLED display is brighter and more vivid
720x1280 pixelsvs+1080x1920 pixels125%
Higher resolution screen
277 PPIvs+424 PPI53%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
LED flashvs+LED flash on both camerasAdvantage
The LED flash on both cameras helps in dark places or in low light
(front) 5MPvs+(front) 16MP2 times
Higher resolution secondary camera to take pictures and selfies
Not supportedvs+GyroscopeAdvantage
Sensors help you use the device
2800 mAhvs+3000 mAh7%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM)
(hybrid slot/shares the same microSD slot)Advantage
It's more advantageous to have more than one phone operator in the same device

27 Common items in both devices
Until 256GB microSD, microSDXC
16 million
(back) 13MP
Only digital zoom
Autofocus / PDAF: phase detection autofocus
EIS: Digital stabilization
HDR photo only main camera
+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 differencesClear highlight

📱 Model features

LG X400 (K121S)Vivo X7 (128GB)
ModelX400 (K121S)X7 (128GB)
Other model namesSKT LG X400, LGM-K121S, LGMK121S (SK Telecom)BBK vivo X7 Dual-Sim
Country or region availableSouth Korea
South Korea
(Global, International)ChinaHong KongTaiwan
(Global, International), China, Hong Kong, Taiwan
BrandLGVivo
Release date2/1/20177/1/2016
Depth8 millimeters (0.31 inches)7.2 millimeters (0.28 inches)
Size (width x height)75.29 x 148.7 millimeters (2.96 x 5.85 in)71.3 x 147.3 millimeters (2.81 x 5.8 in)
Weight142 grams (4.97 ounces)151 grams (5.29 ounces)
Build, materialsPlastic body, glass frontfeature not registered
Protection against water and othersNot supportedNot supported

🤖 Operating System

LG X400 (K121S)Vivo X7 (128GB)
System versionAndroid 7.0 NougatAndroid 5.1.1 Lollipop
Firmware updateAndroid 8.0 Oreofeature not registered
User Interfacefeature not registeredfeature not registered

⚙️ Processor

LG X400 (K121S)Vivo X7 (128GB)
Chipset64bit - MediaTek MT6750 (28nm)64bit - Qualcomm Snapdragon 652 MSM8976 (28nm)
CPUOcta-Core, 2 processors:
1.5GHz Quad-Core ARM Cortex-A53
1GHz Quad-Core ARM Cortex-A53
Octa-Core, 2 processors:
1.8GHz Quad-Core ARM Cortex-A72
1.4GHz Quad-Core ARM Cortex-A53
GPU graphical controllerARM Mali-T860 MP2 520MhzQualcomm Adreno 510 600Mhz
Performance (benchmark)feature not registeredfeature not registered

💽 Memory and storage

LG X400 (K121S)Vivo X7 (128GB)
RAM memory2GB LPDDR34GB LPDDR3
Internal storage32GB (22GB available)128GB (116GB available)
External storageUntil 256GB microSD, microSDXC
(dedicated slot)
Until 256GB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot)

📲 Display

LG X400 (K121S)Vivo X7 (128GB)
Display typeTFT IPS LCDSuper AMOLED
Screen size5.3" inches5.2" inches
Screen-to-body ratio~69.2% (screen-to-body ratio)~71% (screen-to-body ratio)
Display resolution720x1280 pixels1080x1920 pixels
TouchscreenCapacitive MultitouchCapacitive Multitouch
Pixel density (dot pitch)277 PPI424 PPI
Colors16 million16 million
Scratch-resistant glassNot supportedNot supported
Display featuresfeature not registeredfeature not registered

📶 Mobile networks

LG X400 (K121S)Vivo X7 (128GB)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot)
SIM card1 slot (Single-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
micro-SIM (3FF) and nano-SIM (4FF)
Maximum download/upload300/50 Mbps150/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM MHz bandTri-Band 900/1800/1900Dual-Band 900/1800
Primary 2G networkGSM 900/1800/1900CDMA 800, GSM 900/1800
Primary 3G networkUMTS 2100TD-SCDMA 1900/2000
UMTS 850/900/1900/2100
Primary 4G networkLTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8)
VoLTE
LTE Cat4 (Bands 1,3)
TD-LTE (Bands 38,39,40,41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-AGPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
Secondary 2G networkNot supportedGSM 900/1800
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedGPRS, EDGE

📷 Camera

LG X400 (K121S)Vivo X7 (128GB)
Back camera (main camera)13 megapixels13 megapixels
Main camera resolution4160x3120 pixels4128x3096 pixels
Video recording (primary)Full HD (1920x1080) 30 fpsFull HD (1920x1080) 30 fps
FlashLED flashLED flash on both cameras
Focal aperturef/2.2 (aperture)f/2.2 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor size1/3" inchesfeature not registered
Pixel size1.12µm pixelfeature not registered
AutofocusAutofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo only main cameraHDR photo only main camera
Camera extrasfeature not registeredfeature not registered

📸 Front camera

LG X400 (K121S)Vivo X7 (128GB)
Front camera (secondary)5 megapixels16 megapixels
Front camera resolution2560x1920 pixels4608x3456 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedLED
Focal aperturef/2.4 (aperture)f/2.0 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor size1/5" inchesfeature not registered
Pixel size1.12µm pixelfeature not registered

🔉 Sound and multimedia

LG X400 (K121S)Vivo X7 (128GB)
LoudspeakerSupportedSupported
Active noise cancellation2 microphones or more2 microphones or more
RadioFM (RDS)Not supported
TVDigital TVNot supported
Video formatsMP4, H.264, H.263, XviD, MKVMP4, H.264, H.263
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, WAV, eAAC+, FLAC

🔌 Connectivity

LG X400 (K121S)Vivo X7 (128GB)
USBMicroUSB 2.0, USB OTG On-The-GoMicroUSB 2.0, USB OTG On-The-Go
Audio output3.5mm jack3.5mm jack
TV outputNot supportedNot supported
Bluetooth4.2 + A2DP4.0 + A2DP
WiFi802.11 b/g/n (2.4Ghz)
WiFi Direct, hotspot
802.11 b/g/n (2.4Ghz)
WiFi Direct, hotspot
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging
NFCSupportedNot supported
Infrared portNot supportedNot supported

🧭 Sensors

LG X400 (K121S)Vivo X7 (128GB)
SensorsAccelerometer
Ambient Light sensor
Compass
Fingerprint sensor (rear-mounted)
Proximity sensor
Accelerometer
Ambient Light sensor
Compass
Fingerprint sensor
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

LG X400 (K121S)Vivo X7 (128GB)
Battery typeLi-Ion: Lithium-Ion (Removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity2800 mAh3000 mAh
Charger, watts Standard charging Standard charging
Talk time autonomy9 hoursfeature not registered
Standby390 hours (16.3 days)feature not registered

➕ Other features

LG X400 (K121S)Vivo X7 (128GB)
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot 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: Gold, Rose, Black
- USB OTG On-The-Go
- FunTouch OS 2.5.1
- Fast battery charging

☢️ Radiation rate

LG X400 (K121S)Vivo X7 (128GB)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registeredfeature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
X

We use cookies to provide and improve our services. By using our site, you consent to cookies. See more details: Privacy policy.