Every new Samsonite suitcase equipped with a TSA-approved combination lock comes preset from the factory with the default code 0-0-0. To open a new bag for the first time, simply ensure the dials are set to three zeros and slide the release button or press the latches. To set your own unique code, the process varies by model but generally involves a "reset" mechanism. For most dial locks, you use a pen to press in a small reset button located on the side or bottom of the lock; once it clicks and stays depressed, you turn the dials to your chosen numbers and then slide the main release button to "lock in" the new code. For other models, you might need to hold the release button in the "open" position while you turn the dials. It is critical to remember your new code, as Samsonite locks do not have a "master reset" for security reasons. If you forget your combination, you will likely need to visit an authorized Samsonite repair center, where technicians have the tools to safely unlock the bag without damaging the high-quality casing or the lock mechanism.