T-Mobile Headquarters Address, Corporate Office Location, and Contact Details

About

T-Mobile US, Inc. is America’s second-largest wireless telecommunications carrier and self-styled “Un-carrier,” headquartered at 12920 SE 38th Street, Bellevue, Washington 98006 in the Factoria neighborhood east of Seattle. Originally founded in 1994 as VoiceStream Wireless PCS, the company was acquired by Deutsche Telekom in 2001 and rebranded as T-Mobile USA in 2002, before completing a landmark $26 billion merger with Sprint in April 2020 to become the nation’s largest 5G network operator serving over 140 million subscribers. The Bellevue headquarters campus spans ten buildings in the Factoria and Eastside region, employing approximately 70,000 people and generating $80 billion in annual revenue.

Quick Facts

Founded

June 22, 1994 (as VoiceStream Wireless PCS)

Industry

Wireless telecommunications

Employees

70,000 (as of Dec 31, 2024)

Store Hours

Mon–Fri 10AM–8PM, Sat 10AM–8PM, Sun 11AM–6PM

Customer Service Hours

24/7

Website

t-mobile.com

Contact Page

t-mobile.com/contact-us

Careers

t-mobile.com/careers

What Brings You Here? Find the Right Contact

T-Mobile customer — billing, plan, or service dispute

Call 1-877-746-0909 or dial 611 from your T-Mobile device (available 24/7). For billing disputes, always request a case number before ending the call.

T-Mobile device or trade-in dispute

Call 1-877-746-0909 or visit your nearest T-Mobile store (locator at t-mobile.com/stores) for device exchange, trade-in value disputes, and warranty claims.

T-Mobile Business account inquiry

For T-Mobile for Business accounts, call 1-844-428-9675 or visit t-mobile.com/business.

T-Mobile investor relations

Trades on Nasdaq as TMUS. For investor inquiries, visit investor.t-mobile.com.

Legal / subpoena

Serve T-Mobile US, Inc., 12920 SE 38th Street, Bellevue, WA 98006. Confirm the registered agent through the Delaware Division of Corporations at corp.delaware.gov (incorporated in Delaware).

Phone & Contact Directory

Customer service (24/7)

1-877-746-0909 or dial 611

T-Mobile for Business

1-844-428-9675

Corporate HQ

(425) 378-4000

Investor relations

investor.t-mobile.com

Corporate Headquarters & Office Addresses

Principal HQ

12920 SE 38th Street, Bellevue, WA 98006

Overland Park, KS (Legacy Sprint HQ)

6200 Sprint Pkwy, Overland Park, KS 66251

Frisco, TX (Customer Experience Center)

Frisco, TX

Albuquerque, NM (Customer Experience Center)

Albuquerque, NM

Atlanta, GA Office

Atlanta, GA

New York, NY Office

New York, NY

Parsippany, NJ Office

Parsippany, NJ

Parent Company HQ

Deutsche Telekom AG, Friedrich-Ebert-Allee 140, 53113 Bonn, Germany

How to Escalate a Complaint

1. Call 1-877-746-0909 or dial 611 — T-Mobile’s 24/7 primary line for billing, service, and device complaints.
2. Visit a T-Mobile store — For device, trade-in, and in-store disputes, visit your local store at t-mobile.com/stores.
3. Use t-mobile.com/contact-us — Submit documented written complaints for tracked corporate responses.
4. Mail to the Bellevue HQ — Write to T-Mobile US, Inc., Customer Relations, 12920 SE 38th Street, Bellevue, WA 98006.
5. File with the Washington AG — The Washington AG’s consumer protection division at atg.wa.gov handles Bellevue HQ-based complaints.
6. File with the FCC — For wireless billing, service, and cramming complaints, file at consumercomplaints.fcc.gov.
7. File with the FTC — For deceptive advertising or unfair billing practices, file at ftc.gov/complaint.
8. File with the BBB — T-Mobile US, Inc. is listed with the BBB (Bellevue, WA). File at bbb.org.