In order to hard reset a Ericsson A1018s, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Ericsson A1018s device will be brought back to the default configuration of a brand new device.
1. First, turn the phone on.
2. Open Settings > YES > Master Reset > YES.
3. Tap in the phone's lock code (0000 by default). Press Yes to confirm.
4. Done!