| GENERAL | Network | GSM / HSPA / LTE |
| Versions | J400F/DS (Global DS); J400G/DS |
| LAUNCH | Announced | 2018, May |
| Status | Available. Released 2018, May |
| BODY | Dimensions | 151.7 x 77.2 x 8.1 mm (5.97 x 3.04 x 0.32 in) |
| Weight | 175 g (6.17 oz) | |
| Build | Glass front, plastic back, plastic frame | |
| SIM | Dual SIM (Micro-SIM, dual stand-by) |
| DISPLAY | Type | Super AMOLED |
| Size | 5.5 inches, 83.4 cm2 (~71.2% screen-to-body ratio) | |
| Resolution | 720 x 1280 pixels, 16:9 ratio (~267 ppi density) |
| PLATFORM | OS | Android 8.0 (Oreo) |
| Chipset | Exynos 7570 Quad (14 nm) | |
| CPU | Quad-core 1.4 GHz Cortex-A53 | |
| GPU | Mali-T720 MP2 |
| MEMORY | Card slot | microSDXC (dedicated slot) |
| Internal | 16GB 2GB RAM, 32GB 2GB RAM, 32GB 3GB RAM | |
| eMMC 5.0 |
| MAIN CAMERA | Single | 13 MP, f/1.9, 28mm (wide), AF |
| Features | LED flash, panorama, HDR | |
| Video | 1080p@30fps |
| SELFIE CAMERA | Single | 5 MP, f/2.2 |
| Features | LED flash | |
| Video |
| SOUND | Loudspeaker | Yes |
| 3.5mm jack | Yes |
| COMMS | WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| Bluetooth | 4.2, A2DP, LE | |
| GPS | Yes, with A-GPS, GLONASS, BDS | |
| NFC | No | |
| Radio | FM radio | |
| USB | microUSB 2.0 |
| FEATURES | Sensors | Accelerometer, proximity |
| BATTERY | Type | Li-Ion 3000 mAh, removable |
| Talk time | Up to 20 h (3G) | |
| Music play | Up to 80 h |
| MISC | Colors | Black, Gold, Orchid Gray |
| Models | SM-J400G, SM-J400F, SM-J400M | |
| SAR | 0.36 W/kg (head) 1.49 W/kg (body) |





















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