This guide will show you a simple way on :
How to factory reset SAMSUNG I110 Illusion.
How to wipe all data in SAMSUNG I110 Illusion.
How to bypass screen lock in SAMSUNG I110 Illusion.
How to restore defaults in SAMSUNG I110 Illusion.
All method of master reset SAMSUNG I110 Illusion.
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG I110 Illusion will be as new and your core will run faster.