Many people search for the T-Mobile corporate office when a billing issue, refund delay, cancellation problem, device promotion dispute, account takeover, SIM swap concern, home internet complaint, business account issue, or customer service problem has not been resolved through normal support. This page provides the T-Mobile headquarters address, corporate phone number, customer care routes, complaint escalation tips, review themes, and related wireless support resources.
T-Mobile Corporate Office and Headquarters
T-Mobile US, Inc. is headquartered in Bellevue, Washington. The T-Mobile headquarters campus is the corporate office for the company’s U.S. wireless, home internet, business, prepaid, Metro by T-Mobile, Mint Mobile, and related operations. Many people search for T Mobile corporate office, T-Mobile corporate office, corporate office of T Mobile, T Mobile headquarters, TMobile HQ, or T Mobile head office USA when they are trying to escalate a problem beyond regular customer service.
- Company: T-Mobile US, Inc.
- Operating Company: T-Mobile USA, Inc.
- T-Mobile Corporate Office Address: 12920 SE 38th Street, Bellevue, WA 98006
- T-Mobile Headquarters Address: 12920 SE 38th Street, Bellevue, WA 98006
- T-Mobile Corporate Phone Number: 1-425-378-4000
- T-Mobile Customer Service: Dial 611 from a T-Mobile phone or call 1-800-937-8997
- T-Mobile 5G Home Internet Support: 1-844-275-9310
- T-Mobile Fiber Technical Support: 1-844-783-4237
- T-Mobile for Business Support: 1-800-375-1126
- Metro by T-Mobile Support: 1-888-863-8768
- Customer Relations Mailing Address: T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380
- Official Contact Page: T-Mobile Contact Us
- Official Website: t-mobile.com
Corporate Address and Phone Update
The T-Mobile corporate address remains 12920 SE 38th Street, Bellevue, WA 98006. The T-Mobile corporate number listed in company filings is 1-425-378-4000. For most customer issues, however, T-Mobile directs customers to dial 611 from a T-Mobile phone or call 1-800-937-8997.
The old page listed 1-877-453-1304 as customer service and 1-888-537-4242 for business customer service. Current public T-Mobile contact routes now emphasize 1-800-937-8997 for regular customer care, 1-800-375-1126 for business support, and special numbers for Home Internet and Fiber support.
Choose the Correct T-Mobile Support Route
Before contacting T-Mobile headquarters, choose the route that best matches your issue. A billing dispute, phone upgrade problem, refund delay, cancellation issue, home internet concern, account takeover, or business account complaint may be handled faster through the correct support channel before it reaches the corporate office.
- Wireless customer service: Dial 611 from a T-Mobile phone or call 1-800-937-8997.
- Billing, cancellation, refund, or account dispute: Use customer service and request a case number, call notes, or written confirmation.
- Device promotion or trade-in issue: Save the offer terms, trade-in receipt, shipping confirmation, bill credits, order number, and store notes.
- 5G Home Internet issue: Call 1-844-275-9310 for home internet technical support.
- Fiber issue: Call 1-844-783-4237 for T-Mobile Fiber technical support.
- T-Mobile for Business: Call 1-800-375-1126 or use T-Mobile for Business support resources.
- Metro by T-Mobile: Metro is a related T-Mobile brand with separate support. Visit the related CSN page for Metro by T-Mobile customer service numbers.
- Fraud, SIM swap, or account takeover: Contact T-Mobile immediately and secure your account PIN, password, and number transfer protections.
- TTY or accessibility support: Use T-Mobile’s official accessibility support resources or current TTY guidance.
- Corporate correspondence: Write to T-Mobile US, Inc., 12920 SE 38th Street, Bellevue, WA 98006, or use the Customer Relations mailing address for service disputes.
What to Have Before Contacting T-Mobile Corporate Office
Whether you are contacting T-Mobile customer care, the T-Mobile main office, business support, or the corporate office, your issue is easier to review when you provide clear records. Do not post private account, phone, payment, or identity information in the public review section below.
- Your T-Mobile phone number or account number shared only through secure official channels
- The account holder name and authorized-user status
- Billing cycle, disputed charge, payment date, or refund amount
- Device model, IMEI, order number, trade-in number, or promotion name shared only with T-Mobile privately
- Store location, date, time, and employee or manager name if the issue happened in a store
- Case numbers, chat transcripts, call notes, screenshots, emails, or written promises
- Tracking numbers for trade-ins, returns, or shipped devices
- Home Internet gateway details, signal screenshots, or troubleshooting steps when relevant
- A short timeline explaining what happened and the resolution you are requesting
How to Escalate a T-Mobile Complaint
If regular support has not resolved your issue, escalate the complaint in a documented way. A concise written timeline with account records, dates, bill details, and requested resolution is usually more effective than repeated calls without documentation.
- Start with the correct support team. Use wireless customer care, business care, Home Internet support, Metro support, or fraud support depending on the issue.
- Ask for documentation. Request a case number, order number, return confirmation, device-trade-in record, refund confirmation, or written summary.
- Save all records. Keep bills, payment confirmations, chat transcripts, screenshots, call notes, store receipts, and shipping records.
- Ask for escalation. Request review by a supervisor, account specialist, fraud specialist, billing specialist, business account team, or technical support supervisor.
- Use Customer Relations in writing. For unresolved service or charge disputes, write to T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380.
- Write to headquarters if needed. For unresolved corporate-level issues, send correspondence to T-Mobile US, Inc., 12920 SE 38th Street, Bellevue, WA 98006.
- Use outside routes when appropriate. For wireless billing, number portability, slamming, cramming, accessibility, privacy, or unresolved telecom complaints, consider the FCC, FTC, state attorney general, CFPB, or your card issuer depending on the issue.
T-Mobile Billing, Refund and Cancellation Complaints
Billing and refund issues are common reasons customers search for T Mobile corporate office or T Mobile corporate number. Complaints may involve service charges after cancellation, promised refunds that did not post, device installment balances, trade-in credits, autopay problems, international roaming charges, late fees, plan changes, or business account billing confusion.
For a billing complaint, gather the bill date, disputed amount, payment confirmation, cancellation date, chat transcripts, and the name or ID of any representative who promised a correction. Ask T-Mobile for a written explanation of the adjustment, refund timeline, or credit decision.
Device Promotions, Trade-Ins and Upgrade Disputes
T-Mobile customers often contact headquarters after a device promotion, trade-in, or upgrade does not match what was promised in a store, chat, or phone call. Problems may include missing monthly bill credits, wrong promotion eligibility, delayed trade-in processing, lost trade-in shipments, device return disputes, or disagreement about condition requirements.
Keep the promotion terms, trade-in receipt, store paperwork, shipping label, tracking number, device condition photos, order confirmation, and monthly bill showing the missing credit. If a store representative made a promise, document the store location, date, and manager involved.
Fraud, SIM Swap, Account Takeover and Port-Out Complaints
Fraud, unauthorized SIM swap, port-out fraud, account takeover, identity theft, and suspicious account activity should be handled immediately. Contact T-Mobile customer care at 1-800-937-8997 or dial 611 from a T-Mobile phone if you can still access your service.
Ask T-Mobile about account PIN/password updates, biometric account security, digital ID scan options, number transfer protections, SIM protections, and unauthorized-activity reporting. If a SIM swap or port-out led to financial loss, also contact your bank, email provider, cryptocurrency exchange, credit bureaus, and law enforcement as appropriate.
Network, Coverage, Home Internet and Technical Complaints
Network and technical complaints may involve dropped calls, poor indoor coverage, slow data, missed texts, rural call completion issues, Home Internet speeds, gateway resets, hotspot limitations, roaming problems, or device troubleshooting. Document the address or area, dates, times, device model, signal readings, speed tests, and troubleshooting steps.
For T-Mobile Home Internet, call 1-844-275-9310. For regular wireless technical support, use 1-800-937-8997 or 611. If the issue involves unreliable rural calls or repeated failure to complete calls, use T-Mobile’s official reporting route and keep examples of the date, time, number dialed, and what happened.
T-Mobile for Business Complaints
Business customers may search for corporate office of T Mobile or T Mobile head office USA because a business representative, account executive, billing team, device order, line cancellation, porting request, or contract issue was not resolved. Business account issues often require a different support route than consumer accounts.
For T-Mobile for Business support, call 1-800-375-1126 or use the business support resources tied to Account Hub. Keep the business account number, authorized contact information, contract terms, line list, billing records, device orders, porting documents, and cancellation requests organized before escalating.
Metro by T-Mobile, Mint Mobile and Other T-Mobile Brands
T-Mobile’s network and corporate family include several related brands, but support routes may differ. Metro by T-Mobile, Mint Mobile, Ultra Mobile, Assurance Wireless, prepaid, business, and postpaid T-Mobile accounts do not always use the same customer care process.
If your issue is with Metro by T-Mobile, start with Metro support rather than the regular T-Mobile customer care line. If you are researching Metro customer support, visit the related CSN page for Metro by T-Mobile customer service phone number information.
Privacy, Unwanted Texts and Scam Warnings
If you receive suspicious texts, fake T-Mobile alerts, phishing emails, fake refund messages, fake device upgrade offers, or links asking for your account login, do not click the link. Go directly to T-Mobile.com or use the T-Mobile app. T-Mobile also tells customers to forward suspicious text messages to 7726, which spells SPAM.
You can use ChargeOnMyCard.com to research confusing wireless, phone, app, device, or subscription charges. For SIM swap scams, fake T-Mobile support numbers, fake bill credits, refund scams, phishing texts, or account takeover warnings, visit ThinkItsAScam.com.
Employment, Careers and HR Questions
People may search for T-Mobile head office, T-Mobile main office, or T-Mobile corporate address because they need help with job applications, payroll, benefits, W-2 forms, former employee records, workplace concerns, employment verification, or HR questions. The correct route may depend on whether the role is in a store, call center, corporate office, network team, business sales, engineering, or another department.
For employment questions, use T-Mobile careers, internal HR resources, or the appropriate manager or HR contact. Do not post employee IDs, payroll records, Social Security numbers, medical information, internal documents, or manager accusations with identifying personal details in public comments.
T-Mobile Reviews and Complaints
Current review themes on CorporateOfficeHeadquarters.com include unresolved billing, refund delays, cancellation problems, incorrect account handling, poor service, long support calls, device promotion confusion, and frustration when support representatives or business contacts do not follow through. Several reviewers describe unresolved refunds or bills after cancellation.
These reviews are individual customer experiences and may not represent every T-Mobile customer, store, representative, business account manager, technical support agent, or corporate escalation. When sharing a review, describe the general issue and outcome, but do not post private phone numbers, account numbers, PINs, passwords, SIM details, IMEI numbers, payment information, home addresses, or employee records.
About T-Mobile
T-Mobile US, Inc. is a wireless communications and broadband company headquartered in Bellevue, Washington. T-Mobile provides mobile phone service, 5G service, devices, accessories, prepaid service, business wireless, 5G Home Internet, Fiber service in select markets, and related customer support through stores, websites, apps, customer care, and national retailers.
T-Mobile also operates or supports related brands and services including Metro by T-Mobile, Mint Mobile, Ultra Mobile, Assurance Wireless, T-Mobile Prepaid, and T-Mobile for Business. The company is publicly traded under the stock symbol TMUS.
T-Mobile Competitors and Related Corporate Office Pages
T-Mobile competes with national wireless carriers, cable companies, internet providers, prepaid brands, MVNOs, and technology companies. If you are comparing telecom corporate offices, complaint routes, headquarters addresses, or customer escalation options, these related pages may help:
- AT&T Corporate Office
- Verizon Corporate Office
- Xfinity Corporate Office
- Metro by T-Mobile Corporate Office
- Boost Mobile Corporate Office
- US Cellular Corporate Office
- Google Corporate Office
Related Resources
- Official T-Mobile Contact Page
- Official T-Mobile Support Center
- T-Mobile Home Internet Support
- T-Mobile for Business Support
- T-Mobile Account Fraud Help
- T-Mobile Privacy Contact Page
- T-Mobile Investor Relations
- Metro by T-Mobile Customer Service Numbers on CSN
- FCC Consumer Help Center
- Report Fraud to the FTC
- Research Wireless, Phone and Subscription Charges on ChargeOnMyCard.com
- SIM Swap, Account Takeover and Fake Support Scam Warnings on ThinkItsAScam.com
- Company Reviews on ZeroStars.org
Frequently Asked Questions About T-Mobile Corporate Office
What is the T-Mobile corporate office address?
The T-Mobile corporate office address is 12920 SE 38th Street, Bellevue, WA 98006.
Where is T-Mobile headquarters?
T-Mobile headquarters is in Bellevue, Washington. The T-Mobile headquarters address is 12920 SE 38th Street, Bellevue, WA 98006.
What is the T-Mobile corporate phone number?
The T-Mobile corporate phone number listed in company filings is 1-425-378-4000. For customer care, dial 611 from a T-Mobile phone or call 1-800-937-8997.
What is the corporate office of T Mobile?
The corporate office of T Mobile refers to T-Mobile US, Inc. headquarters at 12920 SE 38th Street, Bellevue, WA 98006.
What is the T-Mobile headquarters address?
The T-Mobile headquarters address is 12920 SE 38th Street, Bellevue, WA 98006. This is also commonly searched as the T Mobile corporate address or T-Mobile HQ address.
What is T-Mobile main office?
T-Mobile main office usually refers to the Bellevue headquarters campus at 12920 SE 38th Street, Bellevue, WA 98006.
How do I contact T-Mobile customer service?
Dial 611 from a T-Mobile phone or call 1-800-937-8997 from another phone. Business customers can use 1-800-375-1126.
How do I escalate a T-Mobile billing complaint?
Start with T-Mobile Customer Care, ask for a case number, save bills and chat transcripts, and request supervisor review. If unresolved, write to T-Mobile Customer Relations, P.O. Box 37380, Albuquerque, NM 87176-7380, or send corporate correspondence to T-Mobile US, Inc., 12920 SE 38th Street, Bellevue, WA 98006.
How do I report a T-Mobile SIM swap or account takeover?
Contact T-Mobile immediately by dialing 611 from a T-Mobile phone or calling 1-800-937-8997. Ask about account PIN/password protection, number transfer protection, SIM protection, biometric verification, and fraud reporting.
Can I post my T-Mobile phone number, account number, SIM number, or PIN in the comments?
No. Do not post phone numbers, account numbers, PINs, passwords, SIM numbers, IMEI numbers, addresses, payment details, employee records, or other private personal information in public comments.
Why Trust CorporateOfficeHeadquarters.com?
CorporateOfficeHeadquarters.com has published corporate office, headquarters, address, phone number, complaints, and review information for major companies for many years. This page is updated to help readers find the correct T-Mobile corporate office, understand the difference between headquarters and customer care, and review common complaint themes before escalating an issue.
Page Update Note
This T-Mobile corporate office page was updated on June 27, 2026, to verify the headquarters address, corporate phone number, current customer service routes, business support routes, fraud and SIM-swap guidance, related resources, image recommendations, and current COH review themes.
Disclaimer
CorporateOfficeHeadquarters.com is not affiliated with T-Mobile US, Inc., T-Mobile USA, Inc., Deutsche Telekom, Metro by T-Mobile, Mint Mobile, Ultra Mobile, Assurance Wireless, or any T-Mobile store. This page is for informational and review purposes only. Company addresses, phone numbers, support routes, plans, billing policies, fraud procedures, business support, device promotions, and hours can change. Contact T-Mobile directly for the most current information.
Share Your Experience with T-Mobile
If you have contacted T-Mobile corporate office, used the T-Mobile headquarters address, called the T-Mobile corporate number, reached customer care, contacted business support, reported fraud, escalated a billing complaint, or tried to resolve a refund, cancellation, device, SIM swap, Home Internet, Metro, account, or payment issue, please share your experience below. Your review can help other readers understand which complaint routes worked and which issues still need escalation.