| Local Name | K40 |
| Additional Information | Also known as LG K12+, LG K12 Plus, LG X4 (2019) Versions: LMX420EMW |
| Technology | GSM / HSPA / LTE |
| 4G Bands | 1, 3, 7, 8, 20 |
| 3G Bands | HSDPA 850 / 900 / 1900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| Announced | 2019, February |
| Status | Available. Released 2019, April |
| Dimensions | 153 x 71.9 x 8.3 mm (6.02 x 2.83 x 0.33 in) |
| Weight | 144 g (5.08 oz) |
| Build | Glass front, plastic back, plastic frame |
| SIM | Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by) |
| Body | MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions |
| Display Type | Li-Ion 3000 mAh, non-removable |
| Screen Size | 5.7 inches, 83.8 cm2 (~76.2% screen-to-body ratio) |
| Resolution | 720 x 1440 pixels, 18:9 ratio (~282 ppi density) |
| OS | Android 8.1 (Oreo), LG UX 7 |
| Chipset | Mediatek MT6762 Helio P22 (12 nm) |
| CPU | Octa-core 2.0 GHz Cortex-A53 |
| GPU | PowerVR GE8320 |
| Card Slot | microSDXC (dedicated slot) |
| Internal Memory | 32GB 2GB RAM, 32GB 3GB RAM | eMMC 5.1 |
| Camera Features | LED flash |
| Video | 1080p@30fps |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA |
| Bluetooth | 5.0, A2DP, LE |
| NFC | Yes (market/region dependent) |
| Radio | No |
| USB | microUSB 2.0, OTG |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity, compass |
| Colors | Black, New Moroccan Blue, New Platinum Gray |
