Alcatel 2051 vs Alcatel 1S
| Type | Clamshell | Touch |
| Dimensions | 105.70 x 52.50 x 17.25 mm | 147.80 x 70.70 x 8.60 mm |
| Weight |  | 146.00 g |
| Display size | 2.40" | 5.50" |
| Display | Color / TFT 256k colors 240 x 320 px (2.40") 167 ppi | Color / IPS TFT 16M colors 720 x 1440 px (5.50") 293 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | | 2G: 2220 min. (37.0 h) 3G: 1440 min. (24.0 h) 4G: 1440 min. (24.0 h) |
| Stand-by (max.) | | 2G: 700 h. (29.2 days) 3G: 600 h. (25.0 days) 4G: 600 h. (25.0 days) |
| Standard battery | Li-Ion 750 mAhBuy powerbank
| Li-Ion 3060 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 8 MB | 32 GB, 64 GB |
| RAM memory | 8 MB | 3 GB, 4 GB |
| Memory cards |  microSD, microSDHC up to 32 GBBuy memory card | microSD, microSDHC, microSDXC up to 128 GBBuy memory card |
| Operating system | - | Android 9.0 Pie |
| Processor | - | Unisoc SC9863A |
| Processor clock | - | 1600 MHz |
| GPU | - | IMG8322 @550 MHz |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(miniSIM, microSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | | nanoSIM, microSD |
| Announced | | 1Q 2019 |
| Other names | 2051D, 20.51 | 5024D; 5025F |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | | 850 900 1900 2100 |
| LTE standard | | FDD LTE: 22600, 2100, 1800, 900, 800, 700 |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo matrix | 2 Mpx | 13 Mpx |
| Sensor size | | 1/3 |
| Pixel size | | 1,12 µm |
| Resolution | 1600x1200 px | |
| Optical zoom | | |
| Flash | | LED |
| Dual-colour LED flash | | |
| Video resolution | | 1920x1080 px |
| Video formats | | MPEG4, H.263, H.264 - 30 fps |
| Additional | FF | AF, f/2.0 |
| Second camera | | |
| Camera type | nd | Depth of field |
| Photo matrix | nd | 2 Mpx |
| Sensor size | nd | 1/5 |
| Pixel size | nd | 1,65 µm |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | MPEG4, H.263, H.264 - 30 fps |
| Additional | nd | FF, f/2.8 |
CAMERAS - FRONT
| First camera | | |
| Camera type | nd | Portrait |
| Photo matrix | nd | 5 Mpx |
| Sensor size | nd | 1/5 |
| Pixel size | nd | 1,12 µm |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video resolution | nd | 1280x720 px |
| Video formats | nd | MPEG4, H.263, H.264 - 30 fps |
| Additional | nd | FF, f/2.2 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| 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 | | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | class 12 | |
| EDGE | | |
| Bluetooth | v2.1 | v4.2 |
| 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 | v2.0 |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | | AAC, AAC+, AMR, APE, FLAC, MIDI, MP2, WAV, WMA |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| 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 | | |
| Recorder | | |
| Vibrations | | |