The short answer.
How to stop spam calls on US Cellular
UScellular’s spam protection is Call Guardian, an app it built with its partner TNS: the free version shows “Potential Spam” for known offenders, and Call Guardian Premium rates each risky call High, Medium or Low and, on Android, blocks calls by the risk level you pick. UScellular also blocks the highest-risk calls in its network, so your phone doesn’t ring.
UScellular is now part of T-Mobile, and T-Mobile hasn’t said whether Scam Shield works on a UScellular plan. Vicem is an AI on its own number: it answers the US Cellular calls you miss, says it’s an AI, and turns scam callers away.
Updated Checked on October 14, 2026
UScellular’s pages, in dated saved copies.
What does US Cellular offer against spam calls?
- Call Guardian: UScellular’s spam app, run with its analytics partner TNS, which UScellular says studies more than one billion call events a day across hundreds of phone companies.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- The free version shows “Potential Spam” on caller ID for known offenders, and “Spam Caller” for numbers on your own spam list.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Call Guardian Premium rates likely spam, fraud and robocalls High, Medium or Low, works to catch faked neighborhood numbers, and backs up your block lists in the cloud.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Apart from the app, UScellular blocks the calls it judges most likely malicious in its network, so your phone won’t ring, and uses STIR/SHAKEN caller ID checks to update its spam detection.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- For texts, UScellular’s free SpamResponse app reports spam with a swipe; it comes preinstalled on most UScellular Android phones and is in the App Store for iPhone.UScellular support, Spam text messages (copy saved March 13, 2026)
Five steps in the app.
How do I turn on Call Guardian?
- Download the Call Guardian app; UScellular offers it for Android and iPhone.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Open it and tap Get started.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Grant the permissions it asks for and verify your phone number.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Pick a subscription: the free version, or Call Guardian Premium.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- With Premium on Android, choose the risk level to block: High, Medium or Low.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
UScellular’s price in a saved copy, read October 14, 2026.
Is Call Guardian free on US Cellular?
- The free version costs nothing. Call Guardian Premium is $3.99 a month per line after a 14-day free trial (copy saved August 11, 2026, read on October 14, 2026).UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- Premium is included free on the Everyday and Even Better plans; on an account with several lines, only the lines on those plans get it free.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- To stop paying for Premium, unsubscribe under Account Status in the Call Guardian app; you go back to the free version.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
How do I block one number on US Cellular?
- With Call Guardian Premium, keep a personal block list of the numbers that keep calling.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- A call that rings once and stops: UScellular says don’t call back. The number looks like a US 10-digit number, but calling it can be an international toll call that adds charges.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- A spam text on Android: in Messages, touch and hold the conversation, then tap Block, Report spam and OK. On an iPhone, tap the name or number at the top of the conversation, then Block this Caller.UScellular support, Spam text messages (copy saved March 13, 2026)
In UScellular’s, the FCC’s and the FTC’s words.
What still gets through on US Cellular?
- UScellular says there may be no single answer that ends robocalls; its network blocking aims to stop as many malicious calls as it can.UScellular support, Spam calls and Call Guardian (copy saved August 11, 2026)
- UScellular warns that fraudsters disguise their numbers and pretend to be UScellular, for example saying your account is past due unless you pay right away.UScellular support, Fraud prevention (copy saved July 11, 2026)
- The FCC: depending on your phone company, a blocked call may go straight to voicemail, ring once, or give you “no notice at all.”FCC, Call Blocking Tools and Resources
- Faked numbers: the FTC says “Scammers can make any name or number show up on your caller ID,” so a scam call from a clean or local-looking number still rings.FTC, Phone Scams
In T-Mobile’s words.
What changes after the move to T-Mobile?
- T-Mobile bought UScellular’s wireless business; the purchase closed on August 1, 2025.T-Mobile newsroom, T-Mobile closes UScellular acquisition (saved August 1, 2025)T-Mobile US, quarterly report (Form 10-Q) for the quarter to June 30, 2026
- UScellular’s spam call help page now sends you to T-Mobile’s support site (checked on October 14, 2026).UScellular support, Spam calls (now redirects to T-Mobile’s support site)
- T-Mobile’s announcement doesn’t say whether Scam Shield works on a UScellular plan. Once your line is on a T-Mobile plan, #662# turns on Scam Block and T-Mobile’s own steps apply.T-Mobile newsroom, T-Mobile closes UScellular acquisition (saved August 1, 2025)T-Mobile support, Self-service short codes
Can I use Call Guardian with Vicem?
Yes. Keep Call Guardian and keep your US Cellular number.
- Once you forward missed calls to Vicem, calls that ring and you don’t answer go to Vicem.
- On UScellular, dial **21*, then 1 and the 10-digit number (or + and the country code for a number abroad), then # to forward every call. To forward only the calls you miss, dial **004*, then the number, then #. Dial ##004# to turn off forwarding of missed calls, or ##002# to turn off every forward, the every-call one too.
- Set Screen Unknown Callers to Silence and turn off Live Voicemail, so the calls your iPhone silences reach Vicem.
- On a Pixel, turn off automatic screening and Take a Message if calls don’t reach Vicem: Google says screened calls aren’t forwarded, and a call Take a Message answers counts as answered.Google, Phone app Help: Call ScreenGoogle, Phone app Help: Take a Message
Where does Vicem fit?
Vicem is an AI with its own number. It answers the calls you miss, says it’s an AI, and turns scam callers away.
- Junk calls and texts are handled without interrupting you.
- Spam calls it turns away never count against your minutes.
- Works when your phone is off.
- Vicem costs from $24 a month, your own number included. Free for 3 days.
What do people ask?
What is UScellular’s premium robocall protection?
Call Guardian Premium. It rates risky calls High, Medium or Low, catches faked neighborhood numbers and keeps your block lists. UScellular listed it at $3.99 a month after a 14-day trial, free on the Everyday and Even Better plans (copy saved August 11, 2026, read on October 14, 2026).
Does Scam Shield work on a US Cellular line?
T-Mobile, which bought UScellular in 2025, doesn’t say for UScellular plans. Once your line moves to a T-Mobile plan, dial #662# to turn on Scam Block.
How do I cancel Call Guardian Premium?
In the Call Guardian app, unsubscribe under Account Status. You go back to the free version.
Will the Do Not Call Registry stop scam calls?
No. The FTC says it won’t stop scammers making illegal calls. It stops sales calls from companies that follow the law, so it still cuts some of the noise.