One unwanted call is easy to ignore. But when unknown numbers keep calling throughout the day, blocking them one by one can quickly become frustrating.
These calls can come from businesses, automated calling systems, or suspicious callers. Your phone or telecom provider may also label some incoming calls as Spam, Spam Risk, Suspected Spam, or something similar.
Blocking a number can stop that particular caller, but it may not solve the problem if unwanted calls keep coming from different numbers. Caller ID can also be spoofed, which means the number shown on your screen may not always be the real source of the call.
So, if you want to know how to stop spam calls, it is better to use a combination of phone settings, number blocking, telecom-provider protection, DND or Do Not Call services, and official reporting options.
Here is how to do it on a cell phone, iPhone, Android phone, and landline.
How to Stop Spam Calls
If you are receiving unwanted calls regularly, start with these steps before changing device-specific settings.
1. Turn On Caller ID and Spam Protection
Most modern smartphones provide some form of caller identification or spam protection.
When enabled, these features can warn you when an incoming call is suspected to be spam and, on supported devices, filter certain unwanted calls.
For example, Google’s Phone app can identify potential spam callers and provides spam-filtering options on supported phones. Apple also provides tools for screening unknown callers and filtering calls identified as spam by supported network providers.
Check your Phone app settings first to make sure these protections are enabled.
2. Block Numbers That Keep Calling You
If the same number repeatedly calls you, block it from your recent call history.
Both iPhone and Android phones allow users to block individual numbers.
This is useful for repeat callers, but manual blocking alone may not be enough if unwanted calls are coming from many different numbers.
3. Check Your Telecom Provider’s Spam Protection
Your telecom provider may also offer call-blocking or call-labeling services.
These services can work alongside your phone’s built-in spam protection and may help identify or filter suspicious calls.
Check your provider’s official website, app, or customer support to see what options are available for your number.
4. Register for DND or Do Not Call Protection
If many of the calls you receive are promotional, registering your communication preferences can help.
For Users in India
TRAI provides a Customer Preference Registration Facility for reducing unsolicited commercial communication.
Consumers can register their communication preferences and report unwanted commercial calls through TRAI’s supported DND channels.
For Users in the United States
The FTC operates the National Do Not Call Registry for mobile and home phone numbers.
However, the registry mainly helps reduce sales calls from legitimate businesses that follow the rules. It does not physically block calls or stop scammers who ignore the law.
5. Report Calls That Continue
If unwanted calls continue after you have enabled spam protection and registered your preferences, report them through the appropriate official channel.
For example, Indian consumers can report unwanted commercial communication through TRAI’s DND system.
Reporting is especially useful when the same type of promotional calls continues despite your registered preferences.
How to Stop Spam Calls on iPhone
If you are looking for how to stop spam calls on iPhone, Apple provides several controls for unknown and unwanted calls.
1. Screen or Silence Unknown Callers
On supported versions of iOS, go to:
Settings → Apps → Phone → Screen Unknown Callers
Depending on your iOS version, available options may include:
- Never
- Ask Reason for Calling
- Silence
With Ask Reason for Calling, an unknown caller may be asked why they are calling before your iPhone rings.
With Silence, calls from unsaved numbers are silenced and sent to voicemail.
Be careful with this option because legitimate callers such as delivery agents, hospitals, recruiters, customers, or service providers may also call from numbers that are not saved in your contacts.
2. Filter Unknown or Spam Calls
Go to:
Settings → Apps → Phone → Call Filtering
Apple provides options for organizing calls from unknown numbers.
Where supported by your network provider, calls identified as spam or fraud can also be silenced and sent to voicemail.
Availability may vary depending on your iOS version and telecom provider.
3. Block a Spam Number on iPhone
If a specific number keeps calling:
- Open the Phone app.
- Find the number in your recent calls.
- Open the caller’s information.
- Select Block Caller.
Blocking is most useful when the same number repeatedly contacts you.
How to Stop Spam Calls on Android
The exact steps for how to stop spam calls on Android depend on your phone and the Phone app it uses.
Google Pixel, Samsung Galaxy, OnePlus, Xiaomi, and other Android devices may have slightly different settings.
1. Turn On Spam Protection in Google’s Phone App
If your device uses Google’s Phone app:
- Open the Phone app.
- Tap More options.
- Open Settings.
- Select Caller ID and spam.
- Turn on See caller ID and spam.
- If available, turn on Filter spam calls.
Google’s spam protection can warn you about potential spam callers and may filter certain calls on supported devices.
2. Block or Report a Spam Number
If an unwanted number keeps calling, open it from your recent calls and use the available Block or Report spam option.
Google’s Phone app allows users to report numbers as spam as well as block them.
3. Use Call Screening Where Available
Some Android phones provide additional call-screening features.
For example, supported Google Pixel phones can use Call Screen to ask a caller why they are calling before you answer.
These features depend on the device, country, and software version.
4. Use Samsung Smart Call on Supported Galaxy Phones
Samsung Galaxy phones may offer Smart Call or Caller ID and spam protection.
On supported devices, Samsung says the feature can identify numbers outside your contacts and warn you about suspected spam or potential fraud.
The option can generally be found under:
Call Settings → Caller ID and spam protection
Availability varies by device and region.
How to Stop Spam Risk Calls
If an incoming call is labelled Spam Risk, Spam, Suspected Spam, or something similar, it means a call-identification system considers the number potentially unwanted or suspicious.
It does not automatically prove that the caller is fraudulent.
1. Let Suspicious Calls Go Unanswered
If you do not recognize the number and are not expecting the call, you do not have to answer it.
You can review any voicemail or other information the caller leaves before deciding whether to respond.
2. Block Repeated Spam Risk Numbers
If the same flagged number keeps calling, block it.
This prevents that particular number from repeatedly reaching you.
3. Do Not Trust Caller ID Alone
Caller ID can be spoofed.
A suspicious caller may make the call appear to come from a familiar number, local area code, business, or organization.
If someone claims to represent an important organization and asks you to take urgent action, verify the organization through an official contact method rather than relying only on the number displayed on your phone.
How to Stop Spam Calls on a Landline
The answer to how to stop spam calls on a landline is different because traditional landlines may not have smartphone-style spam protection.
1. Check Your Provider’s Call-Blocking Service
Start by contacting your landline provider or checking its official website.
Your provider may offer call-blocking or call-labeling services for your connection.
The available features depend on the provider and type of phone service.
2. Find Out Whether Your Phone Uses VoIP
Some home phones use Voice over Internet Protocol (VoIP) instead of a traditional telephone line.
Call-blocking options can differ between VoIP and traditional landline services.
If you are not sure which service you use, check with your provider.
3. Consider a Call-Blocking Device for a Traditional Landline
For traditional landlines, a dedicated call-blocking device may be useful.
Depending on the device, it may use:
- Known unwanted-number databases
- Your personal block list
- Approved caller lists
- Call-screening features
These devices can help stop or screen certain unwanted calls before they reach you.
4. Use the Official Do Not Call Service Available in Your Country
Where available, register your landline with your country’s official Do Not Call or DND service.
For example, the U.S. National Do Not Call Registry accepts both home and mobile phone numbers.
Remember that Do Not Call registration can reduce legitimate sales calls but does not guarantee that illegal scam calls will stop.
What to Do If Spam Calls Continue After Blocking Them
If you have already blocked several numbers but still receive unwanted calls, do not keep relying only on manual blocking.
1. Strengthen Your Spam Filtering
Make sure you are using all the protection available to you:
- Phone-level spam detection
- Unknown caller screening
- Telecom-provider spam protection
- DND or Do Not Call preferences
Using these together provides broader protection than blocking individual numbers.
2. Be Careful With Suspicious Robocalls
If you answer an unexpected call and hear a prerecorded message, avoid interacting with it unnecessarily.
Official consumer guidance from the FTC recommends hanging up on illegal robocalls rather than pressing buttons to speak to someone or supposedly remove yourself from a calling list.
3. Report Persistent Unwanted Calls
If unwanted commercial calls continue despite your registered communication preferences, report them through the official telecom or regulatory channel available in your country.
For Indian users, TRAI provides complaint and reporting options for unwanted commercial communication.
Can You Stop All Spam Calls Completely?
Unfortunately, there is no method that can guarantee that every spam call will disappear.
Callers may use different numbers, caller ID can be spoofed, and spam-detection systems cannot identify every unwanted call correctly.
Call-blocking tools may also occasionally filter a call you actually wanted to receive.
The goal is therefore not to find one perfect setting, but to reduce unwanted calls as much as possible.
The most useful combination is:
Spam Detection + Number Blocking + Provider Protection + DND or Do Not Call Registration + Reporting
Conclusion
Stopping spam calls usually requires more than blocking one number at a time.
Start by enabling the spam protection already available on your phone, block repeat callers, and check whether your telecom provider offers additional filtering. If unwanted promotional calls continue, use the official DND or Do Not Call service available in your country and report persistent unwanted communication.
For businesses, keeping personal and business calling separate can also make call management more organized. A business calling solution like CallerDesk can help teams manage customer conversations through dedicated business communication instead of relying on personal phone numbers.
While no method can guarantee that every spam call will disappear, combining the right phone settings, provider-level protection, official reporting tools, and better calling practices can significantly reduce unwanted interruptions.
