Many cell phones now hold more than just a contact list of phone numbers. Smartphones can store emails and calendar appointments, send emails, browse the Internet and sync with your computer. One way to protect the information on your phone is through a password or lock code. This prevents anyone who doesn't know the code from accessing your personal information. While a password is a good security measure, it can also be a hassle if you forget the code. If you're locked out from your phone, you can try a few options depending upon the model you have.