In order to hard reset a Gretel GT6000, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Gretel GT6000 device will be brought back to the default configuration of a brand new device.
1. Press-hold Power to turn off the phone.
2. Next, press-hold Volume Up + Power buttons for a few seconds.
3. Android or Gooweel logo or Boot Mode will appear. When it does, let go of the above buttons.
4. Press and hold Power until Recovery Mode opens.
5. Next, select wipe data/factory reset option. Navigate to it with Volume, select it with Power buttons.
6. Complete the process by selecting Yes and reboot system now.
7. You have completed the hard reset process.