In order to hard reset a Lenovo A880, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Lenovo A880 device will be brought back to the default configuration of a brand new device.
1. Power down the phone.
2. Continue by press-holding the Power & Volume Up buttons until a message pops up.
3. Choose one of the options available: clear eMMC, Wipe data or Reset Device.
4. As your phone resets and reboots, the hard reset process completes. Well done.