VK Mobile 540 vs Oukitel K13 Pro
| Type | Clamshell | Touch |
| Dimensions | 79.50 x 42.50 x 21.50 mm | 166.90 x 76.60 x 14.20 mm |
| Display size | 1.80" | 6.41" |
| Display | Color / TFT 64k colors 128 x 160 px (1.80") | Color / IPS TFT 16M colors 720 x 1560 px (6.41") 268 ppi |
| Display protection |   | |
| Additional display | Color / CSTN 64k colors 96 x 64 px | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 180 min. (3.0 h) | 2G: 3060 min. (51.0 h) |
| Stand-by (max.) | 2G: 140 h. (5.8 days) | 3G: 744 h. (31.0 days) |
| Playback time (max.) | nd | Audio: 54 h (2.3 days) Video: 14,5 h (0.6 days) |
| Standard battery | Li-Ion 650 mAhBuy powerbank
| Li-Ion 11000 mAhBuy powerbank
|
| Quick battery charging | | Pump Express |
| Wireless battery charging | | |
| Internal memory |  | 64 GB |
| RAM memory | | 4 GB |
| Memory cards | |  microSD, microSDHC, microSDXC up to 128 GBBuy memory card |
| Operating system | - | Android 9.0 Pie |
| Processor | - | MediaTek Helio P22 MT6762 |
| Processor clock | - | 2000 MHz |
| GPU | - | PowerVR GE8320 @650 MHz |
| Touchscreen | | |
| SAR (10g) | 0,67 W/kg | |
| DualSIM | | |
| SIM cards standard | | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Hybrid DualSIM | nd | nanoSIM, microSD |
| Announced | 1Q 2004 | 3Q 2019 |
| Other names | - | - |
| GSM frequencies | 900 1800 | 850 900 1800 1900 |
| UMTS | | 850 900 1700 1900 2100 |
| LTE standard | | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2300 |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo sensor model | | Sony IMX214 |
| Photo matrix | 0.3 Mpx | 16 Mpx |
| Resolution | 640x480 px | |
| Optical zoom | | |
| Flash | | 2x LED |
| Dual-colour LED flash | | |
| Video resolution | | 1920x1080 px |
| Video formats | | MPEG4, H.263, H.264 - 30 fps |
| Additional | - | AF |
| Second camera | | |
| Camera type | nd | Depth of field |
| Photo matrix | nd | 2 Mpx |
| Resolution | nd | 1600x1200 px |
| Optical zoom | nd | |
| Flash | nd | 2x LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | MPEG4, H.263, H.264 - 30 fps |
| Additional | nd | - |
CAMERAS - FRONT
| First camera | | |
| Camera type | nd | Portrait |
| Photo matrix | nd | 8 Mpx |
| Optical zoom | nd | |
| Flash | nd | |
| Dual-colour LED flash | nd | |
| Video formats | nd | MPEG4, H.263, H.264 - 30 fps |
| Additional | nd | FF |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v1.2.1 | v2.0 |
| HSCSD | | |
| HSDPA | | 42.20 Mbit/s |
| HSUPA | | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | - |
| LTE UP | | - |
| WIMAX+ | | |
| GPRS | class 10 | |
| EDGE | | |
| Bluetooth | | v4.2 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | | v802.11 a/b/g/n |
| WiFi frequencies | | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | | v2.0 Type-C |
| 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 | eZi | XT9 |
| 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 | 40 voices | |
| 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 | | |
| Recorder | | |
| Vibrations | | |