On cell phones there are two lock codes that can be used to access the programming information. MSL or master security lock is the code that can be used multiple times to access programming information and BAFS created an app that can extract it from your phone so you don't have to call your service provider for it. There is also the OTKSL which stands for one time key security lock and does the same thing as the msl but can only be used once. The OTKSL is usuaully what service providers use when programming a phone so there is no need to try and get that.