If you're fed up with your phone ringing all the time because of Commercial calls, blocked numbers and fake human resources claimsYou're not alone. Machines asking you to contact them via WhatsApp, pushy telemarketers, or outright scammers impersonating your bank have become commonplace.
The good news is that today we have many ways to block spam calls and private numbers almost completelyThis guide covers both Android and iPhone, as well as specific options from some carriers and solutions for landlines. Below you'll find a comprehensive guide to help you avoid these problems and minimize the risk of phone fraud.
What are spam calls and why do you receive them?
When we talk about telephone spam, we are referring to calls made en masse for commercial or fraudulent purposesThey can come from legitimate telemarketing companies, polling firms, automated systems that dial random numbers, or organized groups of cybercriminals.
These calls come in many forms: Unknown numbers, strange international prefixes, numbers that hang up on the first ring or even calls claiming to be from your electricity company, your phone provider, or your bank. In many cases, they use automated systems to check which numbers are active and who answers.
One particularly dangerous variant is the Vishing, a telephone fraud in which the scammer impersonates a trusted entity (bank, operator, public administration, etc.) to obtain personal data, passwords, or banking information. They often pressure you, rush you, or use veiled threats so you don't have time to think.
The increase in these types of calls is closely related to the exchange and sale of databases with telephone numbersOften, when you sign up for a raffle, accept the terms of an unclear app, or give your number in a promotion, you are unknowingly authorizing the commercial use of your data.
How to identify a spam call or potential scam
Recognizing a spam call isn't always easy, but there are several common signs that can help you identify it. detect when something doesn't smell right even before hanging up.
To begin with, it's suspicious to receive Frequent calls from numbers you don't have savedEspecially if they come from international prefixes you don't usually use or from very unusual numbers. If they also always call at inconvenient times (siesta, night, weekends), that's a bad sign.
Another very typical sign is the very brief calls that are cut off as soon as they are answeredSometimes these are automated systems that check if a number is active; if you return the call you may end up paying more than necessary or confirming that you answer that phone.
Many current mobile phones, both Android and iPhone, already display notifications like these on the screen. “Possible spam”, “Commercial call” or “Suspected fraud”These warnings are based on databases and reports from other users, so you should take them very seriously.
It's also quite common that, after registering on a online giveaway, an aggressive promotion, or a dubious appYou might suddenly start receiving a barrage of marketing calls. This usually indicates that your number has been added to a database that is shared or sold to third parties.
Block calls from hidden and unknown numbers on Android
Most current Android phones include options for Block private numbers, filter spam, and create blacklists.The specific path may change depending on the brand (Samsung, Xiaomi, Huawei, etc.) and the customization layer, but the basic functions are quite similar.
On many models you can access the lock from the settings in the Phone app or from the system settingsNormally, within the call settings, you will find sections such as "Number Blocking", "Block List", "Unknown Numbers" or "Call Restriction".
To directly block a number that has called you, simply Open your call history, press and hold on that number, and choose Block or Mark as spamFrom that moment on, your mobile phone will reject calls from that number (and in some cases SMS messages as well).
On other devices, within Call Settings or the Google Phone app, you can enable options such as “Block unknown/hidden numbers” or “Filter spam calls”If your mobile phone has this function, any call from a hidden number or detected as spam will be automatically rejected or silenced.
On some Android models, you can also create blacklists of contacts or specific numbersOr you can block all calls that aren't in your contacts. This provides a lot of peace of mind, but it can cause you to miss legitimate calls from couriers, doctors, temporary workers, etc.
Use Google's caller ID and spam protection
If your mobile phone uses the Google Phone app, you have a built-in system of Identify and block spam calls Very effective. This function is usually enabled by default, but it's advisable to check it to adjust the protection level.
To manage it, open the Phone app, tap on More options > Settings > Caller ID and spam There you can enable or disable caller ID alerts and automatic filtering. When enabled, your phone sends basic call data (not your contacts) to Google to determine if a call is spam or from a known company.
If you select the option “Filter spam calls”Calls that the system identifies as unwanted will not ring your phone or appear as normal missed calls; they will be recorded in your call history and may leave a voicemail, but they will not bother you.
When you receive a call that the system marks as “Suspected spam” or “Spam”You can choose to answer, ignore, or block the call. To help improve protection, you can mark a specific call as spam: press and hold the call in your recent calls and select "Block / Mark as spam."
Conversely, if you see that a call from someone you know is labeled as spam, you can correct it from [link to corrected app]. Recent calls > Select the call > Not spamFrom then on, that number will no longer be treated as unwanted on your device.
Block hidden numbers on iPhone and mute unknown numbers
In iOS, Apple incorporated a very practical option several versions ago to Automatically silence calls from unknown numbersIt is designed specifically for those who spend their days receiving sales calls.
To activate it you have to go to Settings > Phone > Silence unknown numbersWhen it's turned on, any call that doesn't come from a saved contact, a number you've recently interacted with, or a Siri suggestion will go directly to voicemail and appear as a missed call, but the iPhone won't ring.
This function is very effective for to eliminate a large part of the spam and calls from blocked numbersHowever, it has one major drawback: it also "silences" legitimate calls from numbers that are not in your contacts (for example, messengers, job interviews, or medical notices).
If you want to block a specific number on your iPhone, you can do so from the recent calls list in the Phone app: Tap the information icon next to the number and select “Block this contact”From that moment on, that person will not be able to call you, send you messages, or FaceTime you from that number.
In addition, Apple allows that Third-party apps like Truecaller or Hiya are integrated with the system to identify and flag suspicious calls before you even answer. However, they usually need access to your contacts to function properly, and it's worth considering the impact on privacy.
Third-party apps to block spam and hidden numbers
If the phone's native functions fall short, you can resort to specialized applications for call blocking and spam detectionThey typically use large collaborative databases and offer very advanced filters.
Among the best-known options are Truecaller, Hiya, Call Blocker, Robokiller, Robocall Blocker or Should I answer?Most are available on both Android and iOS, many with a free version and a paid version with extra features.
With these apps you can automatically block Hidden numbers, foreign numbers, calls from numbers not saved in your contacts or even phones that have received negative reviews from other users. They also allow you to mark them as spam to help the rest of the community.
Typical usage involves opening the application after installation and Activate the blocking of incoming calls from hidden or suspicious numbers in your settings.From there, the app filters and alerts you when it detects something unusual.
However, before installing any app of this type, it is important to Check reviews, permissions, and developerSome apps require access to your call log and contacts, which has privacy implications. Make sure you download the app from an official source and a reputable developer to avoid malware.
Mobile operator spam blocking services
In addition to what the operating system itself offers, many operators have their own proprietary systems for blocking fraudulent and commercial callswhich work at the network level and can be very effective in stopping the avalanche before it reaches your mobile.
In Spain, for example, some companies allow it through their customer app Activate spam call blocking on all your mobile linesBy doing so, the operator filters suspicious calls centrally and notifies you by SMS when the service is operational.
In the app of certain operators you can even see a History of threats managed by them: blocked fraudulent calls, detected spam attemptsetc. It's a very visual way to see how many attempts fail.
In the United States, some providers have specific quick codes and services. For example, T-Mobile customers can dial #662# to block all suspected spam calls On iPhone and Android, and deactivate it with other codes. They also offer Scam Shield, a free app that filters telemarketing and robocalls.
Verizon offers its users a feature called Call Filter to detect, filter and block spam and high-risk callsMeanwhile, AT&T has its ActiveArmour solution, which allows you to configure what types of calls you want to block, send to voicemail, or mark as suspicious.
How to stop spam on landlines
Landline phones are not immune to the spam plague either. Although it may seem like a thing of the past, they are still widely used for Telemarketing, surveys, and scams specifically targeting older peopleFortunately, there are also measures to reduce it.
In some countries, such as the United States, you can register your landline number in the Federal Trade Commission call restriction recordThe process can be done by phone or through their website, and allows you to register several numbers at once.
When your number is on this list, Many reputable telemarketers stop using it for marketing campaignsBecause they are legally obligated to respect the list. It's not a complete solution (criminal gangs and scammers ignore these rules), but it usually reduces the volume of calls considerably.
In addition, some landline telephone operators offer Service codes with an asterisk to block specific numbers or reject anonymous callsFor example, on certain networks, dialing *60 allows you to block the last number that called you or add a new one to a block list.
Other services, such as the *77 code, They automatically reject calls from hidden or unidentified numbers.If you no longer want that filter active, you can usually just dial *87 to deactivate it. It's a good idea to check with your provider which specific codes are available in your area.
Prevent your number from ending up on spam lists
Beyond blocking, it's essential to change some habits to drastically reduce the likelihood of your number circulating in commercial databasesThe less you share, the fewer calls you'll get.
A very useful measure in Spain is to register in the Robinson List, a free service where you register your number to avoid receiving unsolicited telephone advertising.It is primarily designed to stop calls from companies with which you have no contractual relationship.
It's also worth reviewing carefully. the permissions you grant when installing apps on your mobile phoneMany apps request access to contacts, calls, or SMS messages when it's not strictly necessary; this can end up with your number (and those in your address book) falling into the hands of third parties.
Whenever possible, limit permissions from the system settings and Avoid installing apps from unknown sources or those with very negative reviews.And when you participate in sweepstakes or promotions, pay close attention to the fine print regarding the commercial use of your data.
Finally, if you receive a call that seems like a scam, the best thing to do is Do not answer, do not return the call, and do not press automatic menu options.Doing so may confirm that your number is active and, in some cases, involve additional costs.
What to do if you don't want to silence all unknown calls
Many people are reluctant to activate features like “Mute unknown numbers” on iPhone or bulk blocking of unsaved calls on Androidbecause they need to receive legitimate communications from phone numbers that are not in their contacts.
If you're in this situation, the most reasonable strategy is to combine spam identifier, blocking of problematic numbers, and specialized appsInstead of an indiscriminate general block. This way, you remain reachable, but you filter out the worst.
For example, you can go individually blocking the numbers from which you receive recurring spamAlthough it might be a bit of a hassle, over time you'll close the loop and significantly reduce the noise. Many users have already accumulated hundreds of blocked numbers.
Activating the Anti-spam protection from the operator or Google, without completely silencing unknown sendersThis way you'll receive a "possible spam" warning and can decide whether to reply or hang up before saying a word.
And if you decide to use a third-party app, configure its filters so that Only block the most suspicious calls (robot calls, hidden numbers, specific area codes)while keeping normal national calls, couriers, and other regular services open.
Strengthen your security beyond phone calls
Spam calls aren't just annoying: they can also be a gateway to phishing, phone tracking, or even identity theftThat's why it's advisable to combine call blocking with good digital security practices.
Install a trusted mobile security solution It can help you detect malicious links sent to you via SMS or messaging apps, as well as other online threats that often go hand in hand with phone spam.
Similarly, it's key to get used to Do not share sensitive data over the phone. If you're not absolutely sure who's on the other end, your bank will never ask you for full PINs, card codes, or online banking passwords over the phone.
If in doubt, hang up and call again. Your organization's official phone number, searched by you (on their website, on the back of the card, in the official app), never to the number they gave you in the suspicious call, however convincing it may seem.
With all these measures combined—blocking hidden numbers, Android and iOS spam filters, carrier services, registering on advertising opt-out lists, specialized apps, and good security habits—it is possible greatly reduce annoying calls and minimize the risk of falling victim to telephone fraud.while maintaining the ability to receive the important calls that you are interested in.