| Local Name | Galaxy M40 |
| Additional Information | Versions: SM-M405FN/DS (Global); SM-M405F/DS (India); SM-M405G/DS (LATAM) |
| Technology | GSM / HSPA / LTE |
| 4G Bands | LTE band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) |
| 3G Bands | HSDPA 850 / 900 / 2100 |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 400/50 Mbps |
| Announced | 2019, June |
| Status | Available. Released 2019, June |
| Dimensions | 155.3 x 73.9 x 7.9 mm (6.11 x 2.91 x 0.31 in) |
| Weight | 168 g (5.93 oz) |
| Build | Glass front (Gorilla Glass 3), plastic back, plastic frame |
| SIM | Hybrid Dual SIM (Nano-SIM, dual stand-by) |
| Display Type | PLS TFT capacitive touchscreen, 16M colors |
| Screen Size | 6.3 inches, 97.4 cm2 (~84.9% screen-to-body ratio) |
| Resolution | 1080 x 2340 pixels, 19.5:9 ratio (~409 ppi density) |
| Protection | Corning Gorilla Glass 3 |
| OS | Android 9.0 (Pie); One UI |
| Chipset | Qualcomm SDM675 Snapdragon 675 (11 nm) |
| CPU | Octa-core (2x2.0 GHz Kryo 460 Gold & 6x1.7 GHz Kryo 460 Silver) |
| GPU | Adreno 612 |
| Card Slot | microSDXC (uses shared SIM slot) |
| Internal Memory | 64GB 4GB RAM, 128GB 6GB RAM | eMMC 5.1 |
| Camera Features | HDR |
| Video | 1080p@30fps |
| Loudspeaker | Yes |
| 3.5mm Jack | No |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| Bluetooth | 5.0, A2DP, LE |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, BDS |
| NFC | Yes |
| Radio | FM radio |
| USB | 2.0, Type-C 1.0 reversible connector |
| Sensors | Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass |
| Battery | Non-removable Li-Po 3500 mAh battery |
| Colors | Seawater Blue, Midnight Blue, Cocktail Orange |
| SAR EU | 0.27 W/kg (head) 1.17 W/kg (body) |
