The call may not be completed if the person being called has set their phone to not accept anonymous calls. Instead of connecting, a message may be displayed requesting this feature be disabled and to try again.
How Do I Hide My Caller ID From Being Displayed When Calling Someone From My SCH-U810 (Renown) Phone?
To prevent your phone number from displaying on another phone’s caller ID screen, first enter asterisk, 6, 7 ( *67), then enter the phone number to call and press the green SEND key.
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