Allview V2 Viper X+ vs Allview X4 Extreme
| Type | Touch | Touch |
| Dimensions | 154.00 x 77.00 x 7.20 mm | 166.40 x 83.30 x 9.10 mm |
| Weight | 155.30 g | 226.90 g |
| Display size | 5.50" | 6.00" |
| Display | Color / AMOLED 16M colors 720 x 1280 px (5.50") 267 ppi | Color / IPS TFT 16M colors 1080 x 1920 px (6.00") 367 ppi |
| Display protection |   | Corning Gorilla Glass Buy screen protector
|
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 821 min. (13.7 h) | 2G: 1510 min. (25.2 h) |
| Stand-by (max.) | 2G: 393 h. (16.4 days) | 2G: 379 h. (15.8 days) |
| Standard battery | Li-Po 3150 mAhBuy powerbank
| Li-Po 4550 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 16 GB | 64 GB |
| RAM memory | 3 GB | 4 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 128 GBBuy memory card | microSD, microSDHC, microSDXC up to 256 GBBuy memory card |
| Operating system | Android 5.1 Lollipop | Android 7.0 Nougat |
| Processor | MediaTek MT6753 | MediaTek Helio P25 MT6757CD |
| Processor clock | 1300 MHz | 2500 MHz |
| GPU | ARM Mali-T720 @450 MHz | ARM Mali-T880 MP2 @900 MHz |
| Touchscreen | | |
| SAR (10g) |  | 1,01 W/kg |
| DualSIM | | |
| SIM cards standard | DualSIM(microSIM, microSIM) | DualSIM(microSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | | microSIM, microSD |
| Announced | 4Q 2015 | 2Q 2017 |
| Other names | - | X4 Soul Extreme |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 900 1900 2100 | 850 900 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1800, 800 TDD LTE: 2600, 2300, 1900 | FDD LTE: 2600, 2100, 1800, 900, 850, 800 TDD LTE: 2600, 2500, 2300, 1900 |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo sensor model | Samsung S5K3M2 | Sony IMX258 |
| Photo matrix | 13 Mpx | 13 Mpx |
| Resolution | 4128x3096 px | 4128x3096 px |
| Optical zoom | | |
| Flash | LED | 2x LED |
| Dual-colour LED flash | | |
| Video resolution | 1920x1080 px | 1920x1080 px |
| Video formats | MPEG4, H.263, H.264 - 30 fps | MPEG4, H.263, H.264 |
| Additional | AF | AF, f/2.0 |
| Second camera | | |
| Photo matrix | nd | 5 Mpx |
| Resolution | nd | 2592x1944 px |
| Optical zoom | nd | |
| Flash | nd | 2x LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | MPEG4, H.263, H.264 |
| Additional | nd | FF |
CAMERAS - FRONT
| First camera | | |
| Photo matrix | 5 Mpx | 20 Mpx |
| Resolution | 2592x1944 px | |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video formats | MPEG4, H.263, H.264 - 30 fps | MPEG4, H.263, H.264 |
| Additional | - | FF, f/2.0 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 21.00 Mbit/s | 21.10 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | - | - |
| LTE UP | 51.00 Mbit/s | 51.00 Mbit/s |
| WIMAX+ | | |
| GPRS | class 12 | class 10 |
| EDGE | class 10 | class 10 |
| Bluetooth | v4.0 | v4.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g/n | v802.11 a/b/g/n |
| WiFi frequencies | 2,4 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 Type-C | v2.0 |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | XT9 | XT9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | 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, WAV, eAAC+ | AAC, AAC+, AMR, WAV, eAAC+ |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Java | ART | 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 | | |
