Aligator S4090 Duo
| Type | Touch |
| Dimensions | 125.00 x 63.00 x 10.00 mm |
| Weight | 110.00 g |
| Display size | 4.00" |
| Display | Color / IPS TFT 16M colors 480 x 800 px (4.00") 233 ppi |
| Display protection |   |
| Additional display | |
| Protection of the secondary display | |
| Standard battery | Li-Ion 1500 mAhBuy powerbank
|
| Quick battery charging | |
| Wireless battery charging | |
| Internal memory | 8 GB |
| End-user memory | 5.05 GB |
| RAM memory | 1 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 256 GBBuy memory card |
| Operating system | Android 8.1 Oreo Go |
| Touchscreen | |
| DualSIM | |
| SIM cards standard | DualSIM(microSIM, microSIM) |
| DualSIM mode | dual standby |
| Hybrid DualSIM | |
| Other names | - |
| GSM frequencies | 850 900 1800 1900 |
| UMTS | 900 2100 |
| LTE standard | |
| Standard 5G | |
| CDMA | |
| Standard TD-SCDMA | |
| UMA | |
CAMERAS - BACK
| First camera | |
| Camera type | Standard |
| Photo matrix | 5 Mpx |
| Optical zoom | |
| Flash | LED |
| Dual-colour LED flash | |
| Video formats | H.263, H.264, MPEG4 |
| Additional | AF |
CAMERAS - FRONT
| First camera | |
| Camera type | Portrait |
| Photo matrix | 2 Mpx |
| Optical zoom | |
| Flash | |
| Dual-colour LED flash | |
| Video formats | H.263, H.264, MPEG4 |
| Additional | FF |
SENSORS
| Accelerometer | |
| Magnetometer | |
| Gyroscope | |
| Barometer | |
| Altimeter | |
| Gravity | |
| Hall-effect | |
| Iris scanner | |
| Fingerprint scanner | |
| Thermometer | |
| Hygrometer | |
Data transfer
| xHTML | |
| WAP | v2.0 |
| HSCSD | |
| HSDPA | 21.10 Mbit/s |
| HSUPA | 5.76 Mbit/s |
| HSPA | |
| HSPA+ | |
| LTE DL | |
| LTE UP | |
| WIMAX+ | |
| GPRS | |
| EDGE | |
| Bluetooth | v4.0 |
| A2DP Profile | |
| HDMI | |
| WiFi | v802.11 b/g/n |
| WiFi frequencies | 2,4 GHz |
| WiFi Direct | |
| WiFi Display | |
| DLNA | |
| Miracast | |
| WiFi hotspot | |
| IrDA | |
| USB | v2.0 |
| GPS | |
| Beidou | |
| NFC | |
COMMUNICATION AND MESSAGING
| Call waiting | |
| Conferency | |
| Call forwarding | |
| Push To Talk | |
| Instant Messenger | |
| SMS | |
| EMS | |
| MMS | |
| Dictionary | T9 |
| Swype | |
| e-mail client | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | |
| RSS Reader | |
Multimedia
| Radio | |
| MP3 | |
| Stereo speakers | |
| Audio Jack | 3.5 mm |
| HD Voice | |
| Sound formats | AAC, AAC+, AMR, MID, WAV, eAAC+ |
| Polyphony | |
| Video ringtone | |
| Ring composer | |
| Games | |
| Java | ART |
| Videophone | |
| DVB-H television | |
| TV-Out | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | |
| Stopwatch | |
| Alarm | |
| Calculator | |
| Currency converter | |
| Organizer | |
| Calendar | |
| Flight mode | |
| SyncML | |
| Data and fax | |
| Screensaver | |
| Themes | |
| Interchangeable covers | |
| Voice dial | |
| Speakerphone | |
| Vibrations | |