| LG G4 | LG Optimus L9 |
| Manufacture | LG | LG |
| Model | G4 | Optimus L9 |
| Form factor | Block | Block |
| Weight | 155 gram | 125.00 |
| Dimensions (HxWxD) | 148.9 x 76.1 x 9.8 | 131.90 x 68.20 x 8.80 |
| Operating System | Android | Android |
| Networks | 2G - 850/900/1800/1900 3G - 900/2100 | 2G - 850/900/1800/1900 3G - 900/1900/2100 |
| HSCSD |  | |
| GPRS |  | |
| EDGE | | |
| UMTS | | |
| HSDPA | | |
| HSPA+ | | |
| WiMAX | | |
| LTE (4G light) | | |
| WLAN / Wi-Fi | | |
| Wi-Fi Hotspot | | |
| Wi-Fi Direct | | |
| SMS | | |
| MMS | | |
| | |
| HDMI out | | |
| USB port | | |
| MHL | | |
| Bluetooth | | |
| Bluetooth version | 4.1 | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 16 megapixel | 5 megapixel |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | LED | LED |
| Video recording | | |
| Video capture resolution | 1080p | 1080p |
| Second Camera | 8 megapixel, 1080p video capture | VGA (640 x 480) |
| Display size | 5.5 inches | 4.70 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 16777216 | 16000000 |
| Display width | 1440 | 540 |
| Display height | 2560 | 960 |
| PPI | 534.04 | 234.35 |
| Second Display | NA | NA |
| CPU | Qualcomm Snapdragon 808 Quad core 1.44 GHz Cortex-A53 | 1 GHz dual-core |
| GPU | Adreno 418 | NA |
| Memory | 3GB RAM, 32 GB internal storage, expandable with additional 200 GB using micro-SD card | 1 GB RAM, 4 GB storage |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | MP3, AAC, AAC+, eAAC+, WMA | MP3 |
| Java | | |
| Games | Yes, downloadable from Google Play | Yes, downloadable |
| FM Radio | | |
| Battery | 3000 mAh | 2150 mAh |
| Standby time (h) | 360 | NA |
| Talktime (m) | 1140 | NA |
| Wireless Charging | | |
| Browser | Android HTML Webkit | Android HTML Webkit |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | |
| RSS reader | | |
| Voicememo | | |
| PC Synchronization | | |
| SyncML | | |
| Website | Website | Website |