UScellular is now part of T-Mobile for wireless customer service and account support. The former United States Cellular Corporation wireless business was acquired by T-Mobile, while the remaining corporate infrastructure business became Array Digital Infrastructure.
Customers may still search for the UScellular corporate office when they need help with billing, cancellation, number transfers, phone activation, home internet, device issues, account access, business service, store support, or an unresolved customer-service complaint.
How to Contact UScellular Corporate Office
UScellular customer accounts are transitioning to T-Mobile, but many customers can still use the same UScellular support options during the transition. Customers should use the number on their bill, account portal, text notice, or device when the instructions differ from the general information below.
Array Digital Infrastructure, Inc.Formerly United States Cellular Corporation / UScellular
8410 West Bryn Mawr Avenue, Suite 700
Chicago, IL 60631
USA
- Legacy UScellular / Array corporate office phone: 1-773-399-8900
- UScellular customer service: 1-888-944-9400
- Dial from a UScellular phone: 611
- UScellular business support: 1-866-872-4249, also written as 1-866-USC-4BIZ
- UScellular support center: UScellular Support
- UScellular contact page: Contact UScellular
- UScellular and T-Mobile transition information: UScellular Is Now Part of T-Mobile
- Store locator: Find a UScellular Store
- Online account: Manage a UScellular Account
- Official website: UScellular.com
- Array corporate website: Array Digital Infrastructure
The Chicago corporate number is not the best route for routine billing, device, cancellation, porting, activation, plan, or technical-support problems. Most wireless account issues should begin with UScellular support, the UScellular store locator, the customer’s online account, or T-Mobile instructions after the account has moved.
UScellular Mailing Address
UScellularDept. 0205
Palatine, IL 60055-0205
Do not mail payments, phones, SIM cards, identity documents, or dispute paperwork unless UScellular or T-Mobile specifically instructs you to do so. Use the address and instructions shown on your bill, cancellation notice, return label, or official account message.
UScellular Customer Service Hours
UScellular lists phone support hours by time zone. Current general support hours are:
- Central Time: Monday through Friday, 8 a.m. to 9 p.m.; Saturday and Sunday, 9 a.m. to 6 p.m.
- Eastern Time: Monday through Friday, 8 a.m. to 9 p.m.; Saturday and Sunday, 10 a.m. to 7 p.m.
- Pacific Time: Monday through Friday, 8 a.m. to 8 p.m.; Saturday and Sunday, 7 a.m. to 4 p.m.
- Chat support: Generally listed as available 7 a.m. to 10 p.m. Central Time
- Business support: Monday through Friday, 7 a.m. to 8 p.m.; Saturday, 9 a.m. to 6 p.m.; Sunday closed, Central Time
Hours may change during the T-Mobile transition, holidays, outages, or account migrations. Check the official contact page before calling about a time-sensitive issue.
UScellular and T-Mobile Transition
T-Mobile acquired substantially all of UScellular’s wireless operations, including customers, most stores, and certain spectrum assets. The UScellular brand is expected to transition in phases as accounts, stores, support tools, and network access are integrated with T-Mobile.
During the transition, UScellular customers may continue to use many of the same support routes, including calling 1-888-944-9400, dialing 611 from a UScellular device, visiting eligible stores, and using online account tools.
UScellular’s transition information says customers will be notified as accounts move to T-Mobile systems. Customers should watch for official text messages, account notices, email updates, and instructions about T-Mobile ID, T-Life app access, billing, plan options, device upgrades, and account management.
What Customers Should Confirm During the Transition
- Whether the account is still managed by UScellular or has moved to T-Mobile
- Whether the current phone, SIM, or eSIM needs any action
- Whether the billing due date or AutoPay timing will change
- Whether promotions, device credits, or discounts remain active
- Whether a plan change is temporarily unavailable until migration is complete
- Whether the local store can still service the account
- Whether the customer should use the UScellular app, T-Mobile.com, or T-Life
- Whether the customer should contact UScellular support or T-Mobile Customer Care
Do not assume that every account has moved at the same time. Keep official transition notices until billing, device access, number transfer, and account login are working correctly.
What to Have Before Contacting UScellular
UScellular may require account verification before discussing service, billing, device, or cancellation details.
- Account number
- Account PIN
- Account owner or authorized user present
- Phone number on the account
- Billing ZIP code
- Device make, model, IMEI, SIM, or eSIM information
- Store location involved
- Recent bill or payment confirmation
- Promotion or device-credit terms
- Order number, case number, or cancellation confirmation
- Number-transfer PIN or port-out information when changing carriers
- Screenshots of error messages, billing problems, or transition notices
Ask for a case number or reference number before ending the call. Record the representative’s name, department, date, time, and promised follow-up.
UScellular Billing and Payment Complaints
Customers may contact UScellular about unexpected billing changes, continued billing after cancellation, duplicate payments, missing credits, device installments, promotion errors, taxes, fees, or AutoPay problems.
When disputing a bill:
- Download or save the current and prior bills.
- Identify the exact line, device, service, fee, or charge in dispute.
- Check whether the charge is pending, prorated, final, or already posted.
- Keep payment confirmations and bank or card records.
- Ask whether the account is still on UScellular billing or has moved to T-Mobile billing.
- Request a case number and expected review date.
- Ask for written confirmation of any credit, refund, correction, or cancellation.
- Review the next bill to confirm that the correction actually posted.
Do not assume that a promised credit is complete until it appears on the account or final statement.
Canceling UScellular Service
Before canceling UScellular service or moving to another carrier, customers should confirm the cancellation date, final bill, device balance, number-transfer requirements, and any promotional credit terms.
Before canceling or porting out a number:
- Confirm whether the line has a device-payment balance.
- Ask whether cancellation affects any remaining promotion or credit.
- Get the port-out or transfer information required by the new carrier.
- Do not cancel the line before confirming the number transfer, unless you do not need to keep the number.
- Ask whether the account will be billed through the end of the cycle.
- Request a cancellation or port-out confirmation number.
- Keep records showing when the cancellation or transfer was requested.
- Check the final bill for service, device, taxes, fees, or credit balances.
Customers who need a number released quickly should ask whether the delay involves account verification, device unlock status, unpaid balance, transfer PIN, fraud protection, the new carrier, or a system migration issue.
UScellular Number Transfer and Phone Unlock Issues
Customers changing carriers may run into problems involving number transfers, port-out PINs, account locks, phone unlocks, device balances, or fraud-protection holds.
To reduce delays:
- Confirm the account number and transfer PIN before starting the port.
- Make sure the account owner or authorized user is available.
- Confirm that the billing ZIP code and account name match the new carrier’s request.
- Ask whether the device is locked, financed, or still under a promotional agreement.
- Keep the UScellular line active until the number successfully transfers.
- Record the date and time the port request was submitted.
- Ask both carriers for the status when a number remains unavailable.
A number-transfer delay can be especially disruptive for business phones, medical contacts, authentication codes, and family communication. Ask for escalation if the line is inactive and the number has not transferred.
UScellular Device, SIM, and Activation Support
Device problems may involve activation, SIM or eSIM setup, data settings, software updates, trade-ins, device unlocks, battery issues, warranty support, or network compatibility during the T-Mobile transition.
Before visiting a store or calling support:
- Restart the device.
- Confirm that the bill is current.
- Install available software updates.
- Check whether other phones on the account are affected.
- Save error messages or screenshots.
- Confirm whether the phone uses a physical SIM or eSIM.
- Check whether the device was purchased from UScellular, T-Mobile, another carrier, or an unlocked retailer.
- Ask whether transition-related network updates affect the device.
For warranty, repair, or replacement questions, ask whether the issue should be handled by UScellular, T-Mobile, the manufacturer, a device-protection plan, or a retailer.
UScellular Home Internet and Router Complaints
Some UScellular customers use wireless home internet or router-based service. Complaints may involve slow speeds, frequent restarts, equipment replacement, poor signal, plan limits, or store and phone-support teams giving different answers.
Before requesting replacement equipment:
- Record the router model and serial number.
- Test the service in more than one location inside the home.
- Check for outages or network-transition notices.
- Restart the router and record whether the problem improves temporarily.
- Run speed tests at different times of day.
- Document how often the router must be restarted.
- Ask whether the issue is signal strength, device failure, plan deprioritization, tower congestion, or account provisioning.
- Request a case number if a replacement is promised.
If a phone representative and retail store provide conflicting instructions, ask the store or support representative to review the existing case notes before requiring another trip or call.
UScellular Business Customer Support
Business customers can call 1-866-872-4249 for UScellular business support.
Business issues may involve:
- Multiple lines
- Device management
- Billing and invoices
- Employee line changes
- Number transfers
- Hotspots and routers
- Business internet
- Account authorization
- Device upgrades
- Service interruptions affecting operations
For a business complaint, document the account number, affected lines, dates of downtime, support cases, and business impact. Ask whether the account is still handled by UScellular business support or has moved to T-Mobile for Business.
UScellular Lifeline and Government Assistance Changes
UScellular’s transition information stated that UScellular no longer participates in the Lifeline government assistance program and that the UScellular Lifeline discount ended March 31, 2026.
Customers who previously received a Lifeline discount should review their current bill and confirm whether the discount has ended. Customers who still need Lifeline service can check eligibility with another participating Lifeline provider.
T-Mobile’s Lifeline service is offered through Assurance Wireless, which is separate from regular T-Mobile and UScellular customer service.
How to Escalate a UScellular Complaint
- Start with the correct support route. Call 1-888-944-9400, dial 611, use chat, visit a store, or follow the T-Mobile instructions if the account has moved.
- Confirm account status. Ask whether the account is still on UScellular systems or has moved to T-Mobile systems.
- Request a case number. Record the representative’s name, date, time, and department.
- Ask for supervisor review. Explain the issue, the prior contacts, and the exact resolution requested.
- Use written documentation. Save bills, chats, screenshots, payment records, device records, cancellation confirmations, and porting information.
- Visit a store if identity or device verification is required. Bring a state-issued ID and account information.
- Contact the corporate office for significant unresolved matters. Use the Chicago corporate contact for corporate or escalation correspondence, not routine troubleshooting.
- Consider outside complaint options. Wireless billing, porting, service, and number-transfer complaints may be submitted to the FCC or the appropriate state consumer-protection agency when internal support fails.
What to Include in a Written Complaint
- The account number, partially masked when appropriate
- The affected phone number or device
- The store location involved
- The date the problem began
- Prior case numbers
- Names or departments previously contacted
- Copies of bills, payment records, screenshots, or transition notices
- The exact requested resolution
- A reasonable request for written follow-up
Do not publish account PINs, full account numbers, complete phone numbers, Social Security numbers, payment-card information, device IMEI numbers, porting PINs, home addresses, or other private information in a public review.
UScellular Reviews and Complaints
Recent reviews submitted to CorporateOfficeHeadquarters.com describe several customer-service concerns involving UScellular accounts and devices.
Current review themes include:
- Device and data concerns: One customer described frustration with a Moto G Play device, data usage, battery concerns, streaming limitations, and replacement options.
- Cancellation and number-release delays: A customer reported difficulty canceling service, releasing a business phone number, and receiving clear timing after switching providers.
- Home internet and router problems: A reviewer described repeated router restarts, conflicting instructions between phone support and a store, and difficulty obtaining replacement equipment.
- Continued billing after cancellation: A tablet customer said they requested cancellation but continued receiving bills afterward.
- Escalation frustration: Reviews mention long holds, repeated transfers, unclear answers, and difficulty finding someone with authority to resolve the problem.
These reviews represent individual customer accounts and do not prove that every UScellular customer will have the same experience. Outcomes may depend on the market, device, store, account type, transition status, billing system, and whether the account has already moved to T-Mobile.
Customers submitting new reviews should identify whether the issue involved UScellular, T-Mobile transition support, a store, a business account, a device, a number transfer, home internet, or billing.
About UScellular, T-Mobile, and Array Digital Infrastructure
UScellular was formerly one of the largest regional wireless carriers in the United States. Its wireless operations, customers, most stores, and certain spectrum assets were acquired by T-Mobile.
The remaining former United States Cellular Corporation business became Array Digital Infrastructure, Inc. Array is focused on shared wireless communications infrastructure, including cell towers and retained spectrum interests. Array remains headquartered in Chicago and is majority owned by Telephone and Data Systems.
This page is intended to help consumers who still search for UScellular corporate office, UScellular customer service, US Cellular headquarters, UScellular complaints, or UScellular phone numbers during and after the T-Mobile transition.
UScellular’s Competitive Landscape
For wireless customers, UScellular service is now part of T-Mobile’s larger wireless business. Consumers comparing wireless service may also review:
- T-Mobile corporate office and complaints
- Verizon corporate office and complaints
- AT&T corporate office and complaints
Other wireless competitors include Cricket Wireless, Consumer Cellular, Metro by T-Mobile, Visible, Boost Mobile, Mint Mobile, Spectrum Mobile, Xfinity Mobile, and regional internet or wireless providers.
Related UScellular and Wireless Resources
- Official UScellular contact options
- UScellular is now part of T-Mobile
- UScellular support center
- Find a UScellular store
- T-Mobile
- FCC consumer complaint center
- Array Digital Infrastructure
Frequently Asked Questions About UScellular
Where is the UScellular corporate office?
The former United States Cellular Corporation corporate office is located at 8410 West Bryn Mawr Avenue, Suite 700, Chicago, Illinois 60631. The remaining post-sale company is Array Digital Infrastructure.
What is the UScellular corporate phone number?
The legacy UScellular / Array corporate office phone number is 1-773-399-8900. Routine wireless customer-service issues should generally start with 1-888-944-9400 or 611 from a UScellular phone.
What is the UScellular customer-service number?
UScellular customer service can be reached at 1-888-944-9400. Customers may also dial 611 from a UScellular device.
Is UScellular part of T-Mobile?
Yes. T-Mobile acquired substantially all of UScellular’s wireless operations. UScellular customer accounts and stores are transitioning in phases to T-Mobile.
Can I still visit a UScellular store?
During the transition, UScellular customers may still be able to visit local stores for account and service assistance. Use the official store locator to confirm locations that can service a UScellular account.
How do I cancel UScellular service?
Call UScellular customer service, dial 611, visit a store, or follow the T-Mobile instructions if the account has moved. Confirm the final service date, device balance, number-transfer status, and final bill.
How do I transfer my UScellular number to another carrier?
Do not cancel the line before the transfer is complete. Confirm the account number, transfer PIN, account owner information, billing ZIP code, and any device-lock or balance issue before starting the port.
What should I do if UScellular keeps billing me after cancellation?
Save the cancellation confirmation, final bill, payment records, and prior case numbers. Contact support, request supervisor review, and ask for written confirmation of any correction or refund.
What happened to United States Cellular Corporation?
After the wireless-operations sale to T-Mobile, the remaining former United States Cellular Corporation business became Array Digital Infrastructure, focused on wireless infrastructure such as towers and retained spectrum.
Why Trust CorporateOfficeHeadquarters.com?
CorporateOfficeHeadquarters.com has helped consumers locate corporate addresses, headquarters phone numbers, customer-service contacts, complaint resources, and company reviews since 2004.
Related UScellular, Wireless, and Consumer Help Resources
- UScellular customer service numbers, reviews, and complaints
- T-Mobile corporate office and complaints
- Verizon corporate office and complaints
- AT&T corporate office and complaints
- USCC Call Center charge on credit card
- Identify unknown wireless or phone charges on ChargeOnMyCard.com
- Research suspicious wireless texts, phone calls, and account scams on ThinkItsAScam.com
- Read or leave broader company reviews on ZeroStars.org
- Find additional customer-support options on CSNDB.com
- Official UScellular contact options
- UScellular is now part of T-Mobile
- FCC consumer complaint center
- Array Digital Infrastructure
Contact information is reviewed against official company pages, corporate announcements, public records, and reliable sources when available. The review section below allows customers to share firsthand experiences involving billing, device support, cancellation, number transfers, home internet, stores, and escalation.
Disclaimer
CorporateOfficeHeadquarters.com is not affiliated with UScellular, United States Cellular Corporation, Array Digital Infrastructure, T-Mobile US, Telephone and Data Systems, or any UScellular or T-Mobile retail location.
This page is provided for informational purposes and as an independent platform for customer reviews, complaints, ratings, and feedback.
CorporateOfficeHeadquarters.com cannot access wireless accounts, cancel service, release phone numbers, unlock devices, process payments, issue refunds, migrate accounts, approve credits, or resolve T-Mobile transition issues.
Contact UScellular or T-Mobile directly for account-specific assistance.
Share Your UScellular Experience
Have you contacted UScellular or T-Mobile about billing, cancellation, phone activation, number transfers, device problems, home internet, router issues, business service, Lifeline changes, store support, or an unresolved complaint?
Share your experience below. Include the service involved, approximate date, support route used, whether a case number was provided, and whether the issue was resolved.
Do not include account PINs, complete account numbers, complete phone numbers, Social Security numbers, payment information, IMEI numbers, porting PINs, home addresses, or other private personal information.