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- U.S. Cellular
About UScellular
UScellular was a major regional U.S. wireless carrier historically operated by United States Cellular Corporation and headquartered in Chicago, Illinois. The company provided mobile voice and data service, smartphones, tablets, connected devices, business wireless solutions, home internet, IoT, and related telecommunications services in regional markets across the United States.
The company’s status changed fundamentally on August 1, 2025, when T-Mobile completed its acquisition of substantially all of UScellular’s wireless operations and selected spectrum assets. The wireless business became wholly owned by T-Mobile, while the former United States Cellular Corporation changed its legal name to Array Digital Infrastructure, Inc.
Today, the UScellular wireless brand and customer base are being integrated into T-Mobile. Existing UScellular customers can still use UScellular Customer Service and participating stores during the migration period, while the former corporate entity, Array Digital Infrastructure, is now a separate wireless-infrastructure company owning more than 4,400 towers.
Quick Information
Corporate Phone Number
UScellular no longer operates as a standalone public wireless corporation.
Current T-Mobile corporate headquarters phone:
425-378-4000.
Customer Service Number
888-944-9400
Existing UScellular customers can continue using this number during the account transition.
Current hours:
Monday to Friday: 7:00 AM to 6:00 PM CT
Saturday and Sunday: 8:00 AM to 5:00 PM CT.
Corporate Office Address
For the current wireless business parent:
T-Mobile US, Inc.
12920 SE 38th Street
Bellevue, WA 98006-1350
United States
Headquarters Address
The current UScellular wireless business is part of T-Mobile, whose principal executive office is:
T-Mobile US, Inc.
12920 SE 38th Street
Bellevue, WA 98006-1350
United States.
Former UScellular Corporate Successor Address
The former United States Cellular Corporation now operates as:
Array Digital Infrastructure, Inc.
500 W. Madison Street, Suite 810
Chicago, IL 60661
United States.
UScellular does not prominently publish one universal consumer Customer Service email.
Current verified business-sales/support email:
b2baccountexec@uscellular.com.
Array tower inquiries:
Towersinquiry@arrayinc.com.
Industry
Wireless Telecommunications, Mobile Communications, 5G, Business Wireless Services and Connected Devices
Former Legal Name
United States Cellular Corporation
Current Wireless Owner
T-Mobile US, Inc.
T-Mobile completed the acquisition of substantially all UScellular wireless operations on August 1, 2025.
Former Corporate Successor
Array Digital Infrastructure, Inc.
United States Cellular Corporation changed its name to Array upon completion of the wireless-business sale.
Former Headquarters City
Chicago, Illinois
Current Parent Headquarters
Bellevue, Washington
Customer Mailing Address
UScellular
Dept. 0205
Palatine, IL 60055-0205.
Corporate Office Hours
UScellular Customer Service currently operates:
Monday to Friday: 7:00 AM to 6:00 PM CT
Saturday and Sunday: 8:00 AM to 5:00 PM CT.
Website
Current Parent Company Website
Investor Relations
The former wireless carrier no longer has a standalone UScellular public-company Investor Relations function.
Array Digital Infrastructure Investor Relations:
https://investors.arrayinc.com/
Current Array Stock Listing
NYSE: AD.
T-Mobile Stock Listing
Nasdaq: TMUS.
Careers Page
Current wireless-career opportunities are increasingly managed within T-Mobile as integration progresses.
Former infrastructure-related corporate positions belong to Array Digital Infrastructure.
UScellular Products & Services
UScellular historically offered a broad range of wireless products and services. Existing customers continue receiving service during the T-Mobile migration, although products, plans, stores, systems, and network arrangements are gradually transitioning.
Wireless Phone Service
UScellular provides mobile voice, messaging, and data service to existing customers while accounts are migrated into T-Mobile.
Customers can continue using existing service and current UScellular support during the transition period.
5G Service
UScellular customers receive mobile broadband and 5G service where supported.
T-Mobile has stated that integrating the UScellular wireless business is intended to expand rural 5G coverage and strengthen the combined network footprint.
Smartphones
UScellular has sold smartphones from major manufacturers including Apple, Samsung, Google, and Motorola.
Existing customers can continue receiving device and account support through participating UScellular service channels while migration progresses.
Tablets
UScellular offered cellular-connected tablets and tablet data service for qualifying consumers and businesses.
Existing tablet accounts remain subject to transition arrangements.
Smartwatches
Supported smartwatches, including Apple Watch models, have been available with cellular connectivity.
Current device support pages still direct customers to 888-944-9400 for assistance.
Mobile Hotspot
Selected plans and connected devices provide hotspot capability that lets customers share cellular data with laptops, tablets, and other devices.
Features depend on the customer’s existing plan and equipment.
Home Internet
UScellular historically provided fixed wireless home-internet solutions.
Current UScellular web materials increasingly route new home-internet interest to T-Mobile’s 5G Home Internet services.
Business Wireless Service
UScellular continues to provide support for existing business customers during integration.
Current Business Customer Service:
866-872-4249.
Business Smartphones and Devices
Business customers can use smartphones, tablets, routers, and other mobile devices for employee connectivity.
Business account representatives support qualifying organizational deployments.
Internet of Things Solutions
UScellular business services have included IoT connectivity for devices, sensors, monitoring, and field operations.
These solutions help businesses connect equipment without relying entirely on wired infrastructure.
Security Cameras and Sensors
UScellular’s business platform offers cellular-connected cameras and motion sensors.
These can help organizations remotely monitor facilities, assets, and work sites.
Secure Bandwidth Management
Business security solutions include content filtering and bandwidth controls.
Organizations can use these tools to restrict websites, control mobile data use, and implement internet-use policies on cellular-connected equipment.
Business Security Solutions
UScellular has partnered with third-party technology providers to supply security tools for businesses.
Current business support continues through specialized account representatives.
Device Activation
Existing UScellular devices can be activated and managed through current support channels where eligible.
Customers should use the support site or call 888-944-9400 when activation assistance is required.
Account Management
Existing customers can continue accessing supported UScellular account-management tools for payments, device information, and service changes while migration occurs.
Bill Payment
UScellular continues to support account payments for customers whose accounts have not yet migrated.
T-Mobile states that customers will be notified when their accounts move to T-Mobile’s systems.
Retail Store Support
Many former UScellular retail locations remain open during the transition.
Customers can continue visiting participating stores for account, billing, and service support.
T-Mobile Products in Former UScellular Stores
Some UScellular locations are being updated to provide T-Mobile products and services while still assisting existing UScellular customers.
Store appearance and branding can therefore differ during the transition.
Customer Migration to T-Mobile
UScellular customer accounts are being migrated gradually rather than all at once.
Until an account is moved, customers should continue using their normal UScellular Customer Service options.
T-Mobile Network Integration
T-Mobile acquired the wireless operations partly to combine network assets and improve wireless coverage, particularly in rural markets.
The wireless business is now wholly owned by T-Mobile.
UScellular Corporate Phone Numbers
Customer Service Number
888-944-9400.
Customer Service From a UScellular Phone
611
Existing customers can dial 611 directly from their UScellular device.
Customer Service Hours
Monday to Friday: 7:00 AM to 6:00 PM CT
Saturday and Sunday: 8:00 AM to 5:00 PM CT.
Business Customer Service Number
866-872-4249
Also written as:
866-USC-4BIZ
Hours:
Monday to Friday: 7:00 AM to 6:00 PM CT
Saturday: 8:00 AM to 5:00 PM CT
Sunday: Closed.
Business Security Solutions Number
866-616-5587.
Business Support Email
b2baccountexec@uscellular.com.
T-Mobile Customer Care
Once an account has fully migrated to T-Mobile:
611 from a T-Mobile phone
or:
1-800-937-8997.
T-Mobile Corporate Headquarters Number
425-378-4000.
Corporate Headquarters Number
UScellular no longer has an independent operating-company headquarters switchboard because its wireless business is now owned by T-Mobile.
Current parent corporate number:
425-378-4000
Former Corporate Successor Contact
Array Digital Infrastructure does not prominently list a universal consumer switchboard.
Tower inquiries:
Towersinquiry@arrayinc.com.
Toll-Free Number
888-944-9400
Billing Number
888-944-9400
Existing UScellular customers should continue using this number until their account is migrated.
Payment Support
888-944-9400
Device Activation Support
888-944-9400
Local Store Number
Store-specific telephone numbers are available through the UScellular store locator while participating locations remain operational.
Investor Relations Number
UScellular no longer maintains separate investor relations as a wireless company.
Investor matters concerning its corporate successor should be directed to Array Digital Infrastructure.
Array Investor Relations Email
john.toomey@tdsinc.com
and:
karen.samples@tdsinc.com.
Emergency Number
911
Wireless customers experiencing an immediate police, fire, or medical emergency should call 911 where service is available.
How to Reach a Real Person at UScellular
Existing UScellular customers should call 888-944-9400 or dial 611 from their UScellular phone. Current phone-support hours are Monday through Friday from 7:00 AM to 6:00 PM Central Time and weekends from 8:00 AM to 5:00 PM Central Time. Have your account PIN, account owner or authorized user available, a state-issued ID for store visits, and your payment information if the call concerns billing.
T-Mobile has confirmed that UScellular customers can continue using the same support channels until their account is actually moved to T-Mobile. Once migration occurs, customers will receive instructions and can then use T-Mobile Customer Care or participating stores.
UScellular Headquarters & Corporate Office Address
The most important update for this page is that UScellular is no longer a standalone wireless corporation.
Current Wireless Business Parent Headquarters
T-Mobile US, Inc.
12920 SE 38th Street
Bellevue, WA 98006-1350
United States
Corporate Phone: 425-378-4000.
UScellular Wireless Business Acquisition
T-Mobile completed its acquisition of substantially all of UScellular’s wireless operations on:
August 1, 2025.
Acquisition Consideration
T-Mobile transferred approximately:
$2.8 billion in cash
at closing, while approximately:
$1.7 billion of UScellular senior notes
were later exchanged for T-Mobile debt.
Former Corporate Entity Name
Before August 1, 2025:
United States Cellular Corporation
Current Former-Corporate Entity Name
After closing:
Array Digital Infrastructure, Inc.
Array Digital Infrastructure Headquarters
500 W. Madison Street, Suite 810
Chicago, IL 60661
United States.
Array Digital Infrastructure Business
Array is now primarily a:
Wireless communications infrastructure company
rather than a consumer wireless carrier.
It owns and operates more than:
4,400 towers.
Array Geographic Footprint
Array reports towers across:
19 major U.S. markets
with a significant presence in underserved and rural communities.
Array Ownership
Array is approximately:
82% owned by Telephone and Data Systems, Inc.
Array Stock Listing
Array trades on:
New York Stock Exchange
Ticker:
AD.
T-Mobile Ownership of Wireless Business
The UScellular wireless business is now:
Wholly owned by T-Mobile.
Legacy Chicago Status
Older references to UScellular as a Chicago-headquartered wireless carrier should now be clearly marked historical.
Chicago remains the headquarters of Array Digital Infrastructure, the successor to the former corporate entity, but the consumer wireless operations themselves are part of T-Mobile.
How to File a Complaint Against UScellular
During the customer transition, complaint handling depends on whether the account remains on UScellular’s systems or has already migrated to T-Mobile. Customers should confirm which company currently manages their account before escalating.
Step 1: Contact UScellular Customer Service
If your account still operates as a UScellular account, call 888-944-9400 or dial 611 from your UScellular phone. Explain the billing, service, device, coverage, payment, or account problem clearly and ask the representative to document the issue. Keep the date, representative name, and any case or reference number.
Step 2: Visit a Participating UScellular Store
Existing customers can still visit participating UScellular locations for account, billing, and service support while migration is underway. Bring the account owner or authorized user, account PIN, identification, and relevant receipts or device information. T-Mobile has confirmed that many locations continue supporting UScellular accounts during the transition.
Step 3: Request Supervisor or Account Review
If the first contact does not resolve the matter, ask for supervisor review. For disputed charges, device financing, number-porting issues, service cancellation, or recurring billing, provide copies of bills and a concise timeline. If the account has migrated, use the T-Mobile support instructions supplied during the transition.
Step 4: Contact T-Mobile After Migration
Once UScellular notifies you that your account has moved to T-Mobile, use T-Mobile Customer Care by dialing 611 or calling 1-800-937-8997. Explain the previous UScellular complaint and provide any case history so the new support team can review the account after migration.
Step 5: File an Appropriate External Complaint if Necessary
Unresolved wireless-service, number-porting, billing, accessibility, or telecommunications complaints may be submitted to the Federal Communications Commission or the appropriate state consumer-protection authority. Payment disputes may also involve the card issuer or financial institution used for billing. Keep copies of bills, support chats, store receipts, migration notices, and previous complaint records before escalating.
