LG X400 (K121S) vs Google Pixel 9 Pro Fold (GC15S 512GB)
Side by side comparison between LG X400 vs Google Pixel 9 Pro Fold 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
8"
OLED
OLED
2076x2152
48
MP
MP
10mp
16GB
RAM
RAM
Octa-core
4650
mAh
mAh
(Non removable)
What's the better phone? Google Pixel 9 Pro Fold (GC15S 512GB)
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!
6 Advantages 
34 Advantages | 17 Common items in both devices |
| 16 million |
| LED flash |
| Autofocus / PDAF: phase detection autofocus on both cameras |
| Capacitive |
| Multitouch |
| Accelerometer |
| Ambient light sensor |
| +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) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Model | X400 (K121S) | Pixel 9 Pro Fold (GC15S 512GB) |
| Other model names | SKT LG X400, LGM-K121S, LGMK121S (SK Telecom) | Google Pixel 9 Pro Fold GC15S |
| Country or region available |  South Korea |  Japan |
| Brand | LG | |
| Release date | 2/1/2017 | 9/4/2024, Announced: 8/13/2024 |
| Depth | 8 millimeters (0.31 inches) | 5.1 millimeters (0.2 inches) |
| Size (width x height) | 75.29 x 148.7 millimeters (2.96 x 5.85 in) | 150.2 x 155.2 millimeters (5.91 x 6.11 in) |
| Weight | 142 grams (4.97 ounces) | 257 grams (9 ounces) |
| Build, materials | Plastic body, glass front | Aluminum frame, flexible plastic screen, glass back Back: Gorilla Glass Victus 2 Folded: 10.5mm x 77.1mm x 155.2mm |
| Protection against water and others | Not supported | IPX8 certified: water resistant up to 1.5 meters and 30min |
📲 Display | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Display type | TFT IPS LCD | LTPO OLED |
| Screen size | 5.3" inches | 8" inches |
| Screen-to-body ratio | ~69.2% (screen-to-body ratio) | ~88.5% (screen-to-body ratio) |
| Display resolution | 720x1280 pixels | 2076x2152 pixels (1:1) |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 277 PPI | 374 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Refresh rate | feature not registered | 120Hz |
| Display features | feature not registered | 2700nits[peak] HDR10+ Always-On Display Extra display: OLED 6.3" (1080x2424), 422 ppi, 120Hz, HDR, Gorilla Glass Victus 2 |
🤖 Operating System | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| System version | Android 7.0 Nougat | Android 14 |
| Firmware update | Android 8.0 Oreo | Android 16 |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Chipset | 64bit: MediaTek MT6750 (28nm) | 64bit: Google Tensor G4 (4nm) |
| CPU | Octa-core, 2 processors: 4x 1.5GHz ARM Cortex-A53 (Quad-core) 4x 1GHz ARM Cortex-A53 (Quad-core) | Octa-core, 3 processors: 1x 3.1GHz ARM Cortex-X4 (Single-core) 3x 2.6GHz ARM Cortex-A720 (Triple-core) 4x 1.92GHz ARM Cortex-A520 (Quad-core) |
| GPU graphical controller | ARM Mali-T860 MP2 520Mhz | ARM Mali-G715 MP7 (940MHz) |
| Performance (benchmark) | feature not registered | AnTuTu: 1222235 (v10) Geekbench: 4783 (v6) |
💽 Memory and storage | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| RAM memory | 2GB LPDDR3 | 16GB LPDDR5X |
| Internal storage | 32GB (22GB available) | 512GB (458GB available) UFS 3.1 |
| External storage | Until 256GB microSD, microSDXC (dedicated slot) | Not supported |
📶 Mobile networks | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card |
| SIM card | 1 slot (Single-SIM) nano-SIM (4FF) | 1 slot (Single-SIM) nano-SIM (4FF) + e-SIM |
| Maximum Download / Upload | 300/50 Mbps | 5000/1024 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 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 2100 | UMTS 800/850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat6 850/900/1800/2100/2600 (Bands 1,3,5,7,8) VoLTE | LTE Cat24 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 46, 48) VoLTE |
| Primary 5G network | Not supported | SA/NSA/Sub6 (1, 2, 3, 5, 7, 8, 12, 14, 20, 25, 26, 28, 29, 30, 38, 40, 41, 48, 66, 70, 71, 75, 76, 77, 78, 79) mmWave (257, 258, 260, 261) |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6, mmWave |
| Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | UMTS 800/850/900/1700/1900/2100 |
| Secondary 4G network | Not supported | LTE Cat24 (1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 28, 29, 30, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 46, 48) VoLTE |
| Secondary data network | Not supported | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA, Sub6, mmWave |
📷 Camera | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Back camera (main camera) | 13 megapixels | (triple camera) 48 megapixels 10.8MP telephoto f/3.1112mm1/3.2"PDAFOIS5x-optical-zoom 10.5MP ultrawide f/2.2127°1/3.4"PDAF |
| Main camera resolution | 4160x3120 pixels | 8000x6000 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | 4K UHD (3840x2160) 60 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/2.2 (aperture) | f/1.7 (aperture) |
| Focal length | feature not registered | 25mm (lens) |
| Sensor size | 1/3" inches | 1/2" inches |
| Pixel size | 1.12µm pixel | 0.8µm pixel |
| Autofocus | Autofocus | PDAF: phase detection autofocus on both cameras |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | OIS: Optical stabilization |
| Zoom | Only digital zoom | Digital and optical 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/video and HDR photo on front camera |
| Camera extras | feature not registered | 4K@24/30/60fps 1080p@24/30/60/120/240fps 10-bit HDR Extra camera: 10MP wide (f/2.2 23mm 1/3.94" PDAF) |
📸 Front camera | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Front camera (secondary) | 5 megapixels | 10 megapixels |
| Front camera resolution | 2560x1920 pixels | 3872x2592 pixels |
| Video recording (secondary) | Full HD (1920x1080) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.4 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | 23mm (lens) |
| Sensor size | 1/5" inches | 1/3.94" inches |
| Pixel size | 1.12µm pixel | feature not registered |
🔉 Sound and multimedia | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Loudspeaker | Supported | Stereo sound |
| Active noise cancellation | 2 microphones or more | 3 microphones |
| 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) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| USB | MicroUSB 2.0, USB OTG On-The-Go | USB 3.2 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 | 5.3 + A2DP/LE |
| WiFi | 802.11 b/g/n [wifi4] (2.4GHz) WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax/be [wifi7/6E/6] (2.4GHz, 5GHz, 6GHz) + MIMO WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC |
| NFC | Supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Sensors | Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Proximity sensor | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor UWB (Ultra Wideband) |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| Battery type | Li-Ion: lithium-ion (Removable) | Li-Ion: lithium-ion (Non removable) |
| Battery capacity | 2800 mAh | 4650 mAh |
| Charger, watts | Wired charging | 21W Wired fast charging Reverse charging by cable USB Power Delivery 3.0 |
| Inductive / wireless charging | feature not registered | 75W Qi wireless charging |
| Talk time autonomy | 9 hours | feature not registered |
| Standby | 390 hours (16.3 days) | feature not registered |
➕ Other features | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| 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: Obsidian, Porcelain, Hazel, Rose quartz • Google Cast • FeliCa |
☢️ Radiation rate | ||
| LG X400 (K121S) | Google Pixel 9 Pro Fold (GC15S 512GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.98W/kg (head), 1.39W/kg (body) |