How to Stop Spam Calls on Your Phone (Free)
5 min read
Spam and robocalls are relentless because internet calling is nearly free and caller ID is easy to fake. You can't stop scammers from dialing, but you can stop most of their calls from ever reaching you — for free.
Here's the layered approach that actually works, from quickest to most thorough.
Step by step
- 1Turn on your carrier's free scam blocker
All major US carriers offer free network-level call filtering: T-Mobile Scam Shield, AT&T ActiveArmor, and Verizon Call Filter. These flag or auto-block known spam before your phone even rings. Install your carrier's app and turn on blocking.
- 2Silence unknown callers
On iPhone: Settings → Phone → Silence Unknown Callers. On Android (Pixel): the Phone app → Settings → Call Screen or 'Filter spam calls'. Calls from numbers not in your contacts go straight to voicemail without ringing.
- 3Register on the Do Not Call list
Add your number free at donotcall.gov. It won't stop scammers (they ignore it), but it stops legitimate telemarketers and gives you grounds to report violators.
- 4Look up and block repeat offenders
When an unknown number gets through, look it up to see where it's from and its risk, then block it. Repeat blocking trains your phone and cuts the noise over time.
- 5Add a third-party app if needed
If calls still leak through, apps like Hiya, Nomorobo, or RoboKiller add another filtering layer using crowd-sourced spam databases.
Tips
- Never press a button to 'opt out' of a robocall — it just confirms your number is live and invites more.
- Don't answer unknown numbers; if it's important, they'll leave a voicemail.
- Letting calls go to voicemail and looking the number up afterward is safer than answering.
Frequently asked questions
Why am I suddenly getting so many spam calls?
Your number may have been leaked in a data breach, entered in an online form, or simply dialed at random. Spammers also share lists of numbers that answer, so answering once can increase calls.
Is there a way to stop spam calls completely?
Not 100% — spoofing makes it a game of mitigation. But carrier blocking + silencing unknown callers + selective blocking stops the large majority of them.
Does the Do Not Call Registry actually work?
It stops legitimate telemarketers, but scammers ignore it. Use it together with call blocking for the best result.