By following the steps outlined in this article, you should be able to hard reset your Samsung Wave II (S8530) and resolve any software issues you're experiencing.
If you can access the dialer (even without full OS boot, but with keypad responsive), try this secret code.
A menu will appear (Recovery Menu). Use the to navigate and the Power button (or Home key) to select. Select wipe data/factory reset . Scroll down to Yes — delete all user data and confirm. Once the process is finished, select reboot system now . When should you Hard Reset your Samsung S8530?