| Local Name | Galaxy A42 5G |
| Technology | GSM / HSPA / LTE / 5G |
| 4G Bands | 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40, 41 - Europe | 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 34, 38, 39, 40, 41 | 2, 3, 4, 5, 7, 12, 13, 20, 38, 39, 40, 41, 46, 48, 66 - SM-A426U |
| 3G Bands | HSDPA 850 / 900 / 1700(AWS) / 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, 5G |
| Announced | 2020, September 02 |
| Status | Available. Released 2020, November 11 |
| Dimensions | 164.4 x 75.9 x 8.6 mm (6.47 x 2.99 x 0.34 in) |
| Weight | 193 g (6.81 oz) |
| SIM | Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) |
| Display Type | Li-Po 5000 mAh, non-removable |
| Screen Size | 6.6 inches, 105.2 cm2 (~84.3% screen-to-body ratio) |
| Resolution | 720 x 1600 pixels, 20:9 ratio (~266 ppi density) |
| OS | Android 10, upgradable to Android 12, One UI 4 |
| Chipset | Qualcomm SM7225 Snapdragon 750 5G (8 nm) |
| CPU | Octa-core (2x2.2 GHz Kryo 570 & 6x1.8 GHz Kryo 570) |
| GPU | Adreno 619 |
| Card Slot | microSDXC (uses shared SIM slot) |
| Internal Memory | 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM | UFS 2.1 |
| Camera Features | HDR |
| Video | 1080p@30fps |
| Loudspeaker | Yes |
| 3.5mm Jack | Yes |
| 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 | USB Type-C 2.0 |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| Colors | Prism Dot Black, Prism Dot White, Prism Dot Gray |
| SAR EU | 1.15 W/kg (head) 1.33 W/kg (body) |
