LG X400 (K121S) vs Realme 10 Pro+ (RMX3687 128GB/8GB)
Side by side comparison between LG X400 vs Realme 10 Pro+ 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
6.7"
AMOLED
AMOLED
1080x2412
108
MP
MP
16mp
8GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
What's the better phone? Realme 10 Pro+ (RMX3687 128GB/8GB)
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!
17 Common items in both devices |
8 millimeters (0.31 inches) |
Plastic body, glass front |
LED flash |
Only digital zoom |
Autofocus / PDAF: phase detection autofocus |
EIS: Digital stabilization |
(front) Full HD (1920x1080) |
+10 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) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Model | X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) |
Other model names | SKT LG X400, LGM-K121S, LGMK121S (SK Telecom) | Realme 10 Pro Plus 5G (MediaTek Dimensity 1080) |
Country or region available | South Korea | China, India |
Brand | LG | Realme |
Release date | 2/1/2017 | 11/24/2022, Announced: 11/17/2022 |
Depth | 8 millimeters (0.31 inches) | 8 millimeters (0.31 inches) |
Size (width x height) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) | 73.9 x 161.5 millimeters (2.91 x 6.36 in) |
Weight | 142 grams (4.97 ounces) | 175 grams (6.13 ounces) |
Build, materials | Plastic body, glass front | Plastic body, glass front |
Protection against water and others | Not supported | Not supported |
📲 Display | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Display type | TFT IPS LCD | AMOLED |
Screen size | 5.3" inches | 6.7" inches |
Screen-to-body ratio | ~69.2% (screen-to-body ratio) | ~90.5% (screen-to-body ratio) |
Display resolution | 720x1280 pixels | 1080x2412 pixels (20:9) |
Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
Pixel density (dot pitch) | 277 PPI | 394 PPI |
Colors | 16 million | 1 billion |
Scratch-resistant glass | Not supported | Not supported |
Refresh rate | feature not registered | 120Hz |
Display features | feature not registered | HDR10+ 100% DCI-P3 Touch Sampling Rate: 360Hz |
🤖 Operating System | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
System version | Android 7.0 Nougat | Android 13 |
Firmware update | Android 8.0 Oreo | feature not registered |
User Interface | feature not registered | Realme UI 4.0 |
⚙️ Processor | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Chipset | 64bit: MediaTek MT6750 (28nm) | 64bit: MediaTek Dimensity 1080 (6nm) |
CPU | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core) | Octa-core, 2 processors: 2x 2.6GHz ARM Cortex-A78 (Dual-core) 6x 2GHz ARM Cortex-A55 (Hexa-core) |
GPU graphical controller | ARM Mali-T860 MP2 520Mhz | ARM Mali-G68 MC4 |
Performance (benchmark) | feature not registered | AnTuTu: 523167 (v9) Geekbench: 2371 (v5.1) GFXBench: 23fps (ES 3.1 onscreen) |
💽 Memory and storage | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
RAM memory | 2GB LPDDR3 | 8GB LPDDR4X |
Internal storage | 32GB (22GB available) | 128GB (101GB available) UFS 2.1 |
External storage | Until 256GB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card |
SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 2 slots (Dual-SIM) nano-SIM (4FF) |
Maximum Download / Upload | 300/50 Mbps | 2000/1024 Mbps |
Network technology | 2G, 3G, 4G | 2G, 3G, 4G, 5G |
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, GSM 850/900/1800/1900 |
Primary 3G network | UMTS 2100 | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 |
Primary 4G network | LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE | LTE Cat13 (1, 3, 5, 7, 8, 19, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE |
Primary 5G network | Not supported | SA/NSA (1, 3, 5, 8, 28, 40, 41, 77, 78) |
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, LTE-A, SA/NSA |
Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
Secondary 3G network | Not supported | UMTS 850/900/1700/1900/2100 |
Secondary 4G network | Not supported | LTE Cat13 (1, 3, 5, 7, 8, 19, 28) TD-LTE (34, 38, 39, 40, 41) VoLTE |
Secondary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
📷 Camera | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Back camera (main camera) | 13 megapixels | (triple camera) 108 megapixels 8MP ultrawide f/2.216mm112° 2MP macro f/2.4 |
Main camera resolution | 4160x3120 pixels | 12000x9000 pixels |
Video recording (primary) | Full HD (1920x1080) 30 fps | 4K UHD (3840x2160) 30 fps |
Flash | LED flash | LED flash |
Focal aperture | f/2.2 (aperture) | f/1.8 (aperture) |
Focal length | feature not registered | 24mm lens |
Sensor size | 1/3" inches | 1/1.67" inches |
Pixel size | 1.12µm pixel | 0.64µm pixel |
Autofocus | Autofocus | PDAF: phase detection 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 | Supported |
HDR | HDR photo only main camera | HDR photo on both cameras |
Camera extras | feature not registered | 1080p@30/60/120/480fps 720p@960fps |
📸 Front camera | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Front camera (secondary) | 5 megapixels | 16 megapixels |
Front camera resolution | 2560x1920 pixels | 4608x3456 pixels |
Video recording (secondary) | Full HD (1920x1080) | Full HD (1920x1080) |
Front flash | Not supported | Not supported |
Focal aperture | f/2.4 (aperture) | f/2.5 (aperture) |
Focal length | feature not registered | 25mm lens |
Sensor size | 1/5" inches | feature not registered |
Pixel size | 1.12µm pixel | feature not registered |
🔉 Sound and multimedia | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Loudspeaker | Supported | Mono sound with dual speakers 24-bit/192kHz Hi-Res |
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.265, H.264, H.263, XviD, MKV |
Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
USB | MicroUSB 2.0, USB OTG On-The-Go | USB 2.0 Type-C, USB OTG On-The-Go |
Audio output | 3.5mm jack | Type-C reversible connector |
TV output | Not supported | USB Type-C (reversible) |
Bluetooth | 4.2 + A2DP | 5.2 + A2DP/LE |
WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot |
DLNA | Not supported | Not supported |
GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS |
NFC | Supported | Not supported |
Infrared port | Not supported | Not supported |
🧭 Sensors | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Proximity sensor |
Vibrating alert | Supported | Supported |
🔋 Battery | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Battery type | Li-Ion: lithium-ion (Removable) | LiPo: li-ion polymer (Non removable) |
Battery capacity | 2800 mAh | 5000 mAh |
Charger, watts | Wired charging | 67W Wired fast charging USB Power Delivery 3.0 |
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 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
Call control | Voice dialing, Voice recorder | Voice dialing, Voice recorder, Voice commands |
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: Dark Matter Black, Nebula Blue, Hyperspace |
☢️ Radiation rate | ||
LG X400 (K121S) | Realme 10 Pro+ (RMX3687 128GB/8GB) | |
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 |