T-Mobile Headquarters & Corporate Office

About T-Mobile

T-Mobile US, Inc. is one of the largest wireless telecommunications companies in the United States, providing a wide range of mobile and connectivity services to consumers and businesses. The company offers mobile phone service, 5G wireless connectivity, smartphones, tablets, home internet, business telecommunications, prepaid services, and other communications products.

T-Mobile serves customers through its main T-Mobile brand as well as Metro by T-Mobile, which provides prepaid wireless services. Its network and service offerings support everyday mobile communication as well as home and business connectivity, making the company a major participant in the U.S. telecommunications industry.

T-Mobile US, Inc. is publicly traded on the Nasdaq and maintains its headquarters in Bellevue, Washington. From its Washington headquarters, the company manages its nationwide wireless operations, consumer and business services, network development, and broader telecommunications activities.

Quick Information

Corporate Phone Number

425-378-4000

Customer Service Number

1-800-937-8997

Corporate Office Address

12920 SE 38th Street
Bellevue, WA 98006
United States

Headquarters Address

12920 SE 38th Street
Bellevue, WA 98006
United States

Email

T-Mobile primarily uses authenticated account support, chat, telephone, and social customer service rather than one universal general email.

Industry

Wireless Telecommunications

Stock Symbol

NASDAQ: TMUS

Main Services

Wireless, 5G and Home Internet

Prepaid Brand

Metro by T-Mobile

Metro Customer Service

1-888-863-8768

Customer Support

Phone, App and Chat

Website

www.t-mobile.com

T-Mobile Products & Services

Wireless Plans

T-Mobile provides postpaid wireless plans for individuals and families.

Smartphones and Devices

Customers can purchase smartphones, tablets, watches, hotspots, and related devices.

5G Network

T-Mobile operates a nationwide mobile 5G network.

Home Internet

Eligible customers can subscribe to fixed wireless home internet.

Business Services

Businesses can purchase mobile and connectivity services.

Metro by T-Mobile

Metro provides prepaid wireless plans using T-Mobile’s network.

International Services

Eligible plans include or can add international calling, roaming, and data features.

T-Mobile Corporate Phone Numbers

Corporate Headquarters

425-378-4000

This is associated with T-Mobile’s Bellevue corporate headquarters.

T-Mobile Customer Service

1-800-937-8997

Customers can use this number for general account and wireless assistance.

Metro by T-Mobile

1-888-863-8768

This line is dedicated to Metro customers.

How to Reach a Real Person at T-Mobile

Call:

1-800-937-8997

Have:

• Mobile number
• Account PIN
• Device model
• IMEI when relevant
• Billing information
• Plan information
• Trade-in information
• Promotion details
• Description of the concern

available.

Authenticated support through the T-Mobile app or account can also be useful for billing and device issues.

T-Mobile Headquarters & Corporate Office Address

T-Mobile US Corporate Headquarters

T-Mobile US, Inc.
12920 SE 38th Street
Bellevue, WA 98006
United States

Corporate Phone: 425-378-4000

The Bellevue campus supports corporate management, network strategy, finance, technology, marketing, legal, and other company functions.

How to File a Complaint Against T-Mobile

Step 1: Contact T-Mobile Customer Care

Begin by contacting T-Mobile Customer Care at 1-800-937-8997. Clearly explain whether your complaint involves billing, payments, promotions, trade-ins, device financing, wireless service, or another account-related issue.

Step 2: Request a Supervisor

If the first representative cannot resolve your complaint, request a supervisor or higher-level review. This can be particularly helpful for recurring billing problems, promotional disputes, trade-in issues, and device-financing concerns.

Step 3: Use Digital Support

You can also contact T-Mobile through the mobile app or your authenticated online account. Save chat transcripts, screenshots, and other records of your communications for future reference.

Step 4: Document the Complaint

Keep bills, payment confirmations, device-financing agreements, promotion terms, trade-in records, case numbers, and chat records related to your complaint. These documents can help support your position if further review is necessary.

Step 5: Contact Corporate Headquarters

For matters requiring corporate-level attention, correspondence can be directed to:

T-Mobile US, Inc.
12920 SE 38th Street
Bellevue, WA 98006

Include a detailed explanation of the complaint and copies of relevant supporting documentation.

Step 6: File an FCC Complaint

For appropriate wireless-service, billing, number-portability, or telecommunications complaints that remain unresolved, you may consider submitting a complaint to the Federal Communications Commission.

Step 7: Contact Consumer Protection Authorities

If a serious billing, contract, or other consumer dispute remains unresolved after contacting T-Mobile, you may report the matter to the appropriate state attorney general or consumer-protection agency. Include supporting records and details of your previous attempts to resolve the issue.