Where's T-Mobile Headquarter is in?

Answer 1

Telephone
1-800-T-MOBILE
1-888-537-4242

Customer Relations
PO Box 37380
Albuquerque, NM 87176-7380

Customers can use the website at
http://support.t-mobile.com/caseSubmitForm.html

Of course, if you want to contact the MOTHER company, reach them at:

Deutsche Telekom AG
Friedrich-Ebert-Allee 140
Bonn, 53113
Germany - Map
Phone: [phone]
Fax: [phone]
Web Site: http://www.telekom3.de

A public company (NYSE:DT)

Answer 2

2