In order to hard reset a Ericsson GH 218, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Ericsson GH 218 device will be brought back to the default configuration of a brand new device.
1. First of all, turn on the device.
2. Now select Settings > Master Reset.
3. Type in the lock code - 0000 by default, unless changed by the user.
4. Complete the operation by confirming (Yes).