| Hardware and OS | S-TELL M621 | |
| Operating system | Android 6.0 | |
| Processor | MediaTek MT6580, 1300 MHz | |
| Processor cores number | 4 | |
| RAM | 2 GB | |
| Internal Storage | 16 GB | |
| Memory Card Slot | yes, separate | |
| GPU | Mali-400 MP2 | |
| Display | S-TELL M621 | other phones |
| Type | colored IPS, 16.78 mln colors, sensor | |
| Size | 5" | |
| Resolution | 1280x720 | |
| Pixel Density | 294 | |
| Touchscreen | multitouch, capacitive | |
| Aspect Ratio | 16:9 | |
| Automatic display rotation | yes | |
| Connectivity | S-TELL M621 | other phones |
| Standard | GSM 900/1800/1900, 3G | |
| Interfaces | Wi-Fi, Bluetooth, USB | |
| Multi SIM mode | alternate | |
| SIM-card amount | 2 | |
| Camera | S-TELL M621 | other phones |
| Main camera | 13 MP | |
| Main camera functions | autofocus | |
| Front camera | 5 megapixels | |
| Flash | rear, LED | |
| Video Recording | yes | |
| Multimedia | S-TELL M621 | other phones |
| Audio | MP3, FM-radio | |
| Headphone jack | 3.5 mm | |
| Design | S-TELL M621 | other phones |
| Case type | classic | |
| Height | 145 mm | |
| Width | 72 mm | |
| Thickness | 9 mm | |
| Weight | 180 grams | |
| Battery | S-TELL M621 | other phones |
| Capacity | 2350 mA?h | |
| Battery type | Li-Ion | |
| Connector type for charging | micro-USB | |
| Other | S-TELL M621 | other phones |
| Sensors | approaching sensor | |
| Flashlight | yes | |
