AT Mobile Viper vs Samsung Galaxy A40
| Type | Slide | Touch | 
| Dimensions | 98.00 x 48.00 x 17.00 mm | 144.40 x 69.20 x 7.90 mm | 
| Weight | 104.00 g | 140.00 g | 
| Display size | 2.20" | 5.90" | 
| Display | Color / TFT 256k colors 240 x 320 px (2.20") | Color / Super AMOLED 16M colors 1080 x 2340 px (5.90") 443 ppi | 
| Display protection | Corning Gorilla GlassBuy screen protector | |
| Additional display | ||
| Protection of the secondary display | ||
| Talk time (max.) | 2G: 210 min. (3.5 h) | 3G: 1080 min. (18.0 h) | 
| Stand-by (max.) | 2G: 120 h. (5.0 days) | |
| Playback time (max.) | nd | Audio: 62 h (2.6 days) Video: 14 h (0.6 days) | 
| Internet browsing time (max.) | nd | WiFi: 11 h (0.5 days) 3G: 9 h (0.4 days) 4G: 11 h (0.5 days) | 
| Standard battery | Li-Ion 750 mAhBuy powerbank | Li-Ion 3100 mAhBuy powerbank | 
| Quick battery charging | Fast Charging | |
| Wireless battery charging | ||
| Phonebook memory | 300 places | |
| Internal memory | 64 MB | 64 GB | 
| End-user memory | 49.4 GB | |
| RAM memory | 4 GB | |
| Memory cards | microSD | microSD, microSDHC, microSDXC up to 512 GBBuy memory card | 
| Operating system | - | Android 9.0 Pie | 
| Processor | - | Samsung Exynos 7904 | 
| Processor clock | - | 1800 MHz | 
| GPU | - | ARM Mali-G71 MP2 | 
| Touchscreen | ||
| SAR (10g) | 1,34 W/kg | |
| DualSIM | ||
| SIM cards standard | SingleSIM(nanoSIM) | |
| Announced | 1Q 2019 | |
| Other names | - | SM-A405F | 
| GSM frequencies | 900 1800 1900 | 850 900 1800 1900 | 
| UMTS | 850 900 1900 2100 | |
| LTE standard | FDD LTE: 2600, 2100, 1800, 900, 850, 800 TDD LTE: 2600, 2500, 2300 | |
| CDMA | ||
| Standard TD-SCDMA | ||
| UMA | 
 
            
