In order to hard reset a VK Mobile VK3100, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
VK Mobile VK3100 device will be brought back to the default configuration of a brand new device.
1. First of all, turn on the phone.
2. Type in one of these codes: 85558555# , 4268#* , *#27#. Hold the last # for three seconds.
3. Your phone should now reset and restart. Congrats, the hard reset is complete.