T-Mobile offers cell phone tracking services through its optional FamilyWhere program, which allows primary account holders to check the physical location of other phones within that account. The program is primarily designed for parents who want to be able to locate their family members.
FamilyWhere is compatible with all T-Mobile phones, and customers can personalize the program in several ways. They can set recurring schedule checks to automatically locate all phones at a certain time each day, add profile pictures and details to phones and select landmarks to easily identify locations. For privacy and security reasons, all members are notified by text message when the primary account holder has located them through FamilyWhere.
As of 2015, T-Mobile customers can opt in to a free 30-day trial of FamilyWhere, after which a monthly fee is applied to their account.