Thank you for your feedback!
How Do I Hide My Caller ID From Being Displayed When Calling Someone From My T-Mobile T839 (Sidekick 4G) Phone?
Your device allows you to hide your name and number from another person's caller ID when you're calling the person.
Hide Your Caller ID on Another Person's Phone
From any homescreen tap Menu > Settings > Call Settings > All Calls > Show My Number > Hide
© 2015 Samsung Electronics America, Inc. SAMSUNG is a registered trademark of Samsung Electronics Co., Ltd. All other brands, products and services, and their respective trademarks, names and logos, are the property of their respective owners. The above content is provided for entertainment and information purposes only. Consult user manual for more complete information. All information included herein is subject to change without notice. Samsung is not responsible for any direct or indirect damages, arising from or related to use or reliance of the content herein.