This guide will show you a simple way on :
How to factory reset SAMSUNG I9105 Galaxy S Ii Plus .
How to wipe all data in SAMSUNG I9105 Galaxy S Ii Plus.
How to bypass screen lock in SAMSUNG I9105 Galaxy S Ii Plus.
How to restore defaults in SAMSUNG I9105 Galaxy S Ii Plus.
All method of master reset SAMSUNG I9105 Galaxy S Ii Plus.
So Check out how to accomplish hard reset by hardware keys and through android settings. As a result your SAMSUNG I9105 Galaxy S Ii Plus will be as new and your core will run faster.