i have found the reset code for B7330

Samsung B7330 Hard Reset :
To reset the handset’s factory settings, via buttons, follow the steps below:

WARNING: This Reset will Delete ALL added Data from the Handsets Memory
When the handset is powered off, Press and Hold the 5 key then power on the handset
Press either the 1 key (Master Clear) or 2 key (Master Reset) at the Format Menu screen then press the Y key (Yes) at the confirmation prompt