In order to hard reset a Amoi A211, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Amoi A211 device will be brought back to the default configuration of a brand new device.

1. Switch the phone on.

2. Type in one of these codes: *#94267357#, *#9426*357#, *#19912006#, *#77218114#, *#881188#, *#118811#, *#3646633#.

3. Your phone should now restart.