How to Block Spam Calls: A Complete Guide to Stopping Unwanted Calls

Spam calls are unsolicited phone calls made for marketing, promotional, or fraudulent purposes. These calls are often made in bulk to a large number of recipients, with the aim of selling products, services, or, in some cases, scamming individuals. Robocalls, on the other hand, are automated calls that use pre-recorded messages instead of live agents.
 

Spam and robocalls can be classified into several categories:

• Telemarketing calls: Calls promoting products, services, or events.
• Fraud calls: Calls aimed at deceiving recipients into sharing personal or financial information.
• Automated robocalls: Pre-recorded messages, often used for political campaigns, surveys, or scams.

These calls are not only a nuisance but also a potential threat. They can lead to scams, identity theft, and data breaches, causing financial and emotional distress to individuals and businesses.
 

How spam calls affect businesses

Spam calls do not just impact individuals; businesses are equally vulnerable. Here are some of the key ways spam calls can affect organisations:

• Lost productivity: Frequent interruptions from spam calls disrupt daily operations and waste employees’ time.
• Financial losses: Scams targeting business phone numbers can lead to fraudulent transactions or theft of sensitive financial information.
• Data breaches: Phishing attempts through robocalls can compromise business data, leading to reputational damage and potential legal consequences.
• Employee scams: Fraudsters may impersonate clients or partners, tricking employees into sharing confidential information.
   

How to block spam calls on iPhone

Blocking spam calls on an iPhone is straightforward. Follow these steps to safeguard your device:

1. Enable call-blocking features:
   • Go to “Settings” on your iPhone.
   • Tap on “Phone” and select “Call Blocking & Identification.”
   • Add numbers to your block list.
      
2. Use the ‘Silence Unknown Callers’ feature:
   • Navigate to “Settings” and select “Phone.”
   • Toggle on the “Silence Unknown Callers” option. This will send calls from unknown numbers directly to voicemail.
      
3. Download trusted call-blocking apps:
   • Install apps like Truecaller or Hiya from the App Store. These apps identify and block spam calls using their extensive databases.
      
4. Use carrier-specific tools:
   • Check if your service provider offers spam call protection services and activate them.
      

By following these steps, you can significantly reduce the number of unwanted calls on your iPhone.
 

How to block spam calls on Android
 

Android devices offer several options for blocking spam calls. Here is a step-by-step guide:

1. Activate spam identification features:
   • Open the “Phone” app.
   • Tap the three dots in the top-right corner and select “Settings.”
   • Enable the “Caller ID & Spam” option.
      
2. Turn on ‘Do Not Disturb’ mode:
   • Go to “Settings” and select “Sound & Vibration.”
   • Choose “Do Not Disturb” and customise it to block unknown or spam calls.
      
3. Install spam-blocking apps:
   • Download apps like Truecaller, RoboKiller, or Call Control from the Google Play Store. These apps provide real-time spam detection and blocking.
      
4. Leverage carrier services:
   • Contact your service provider to activate anti-spam tools, such as spam filters or caller identification features.

These steps will help you effectively manage and block spam calls on your Android device.

Best call-blocking apps in 2025

Here is a comparison of the top 5 call-blocking apps to help you choose the best one for your needs:

These apps offer a mix of free and paid features, allowing users to customise their call-blocking preferences based on their needs.

Many telecom carriers in India offer anti-spam services to help subscribers block unwanted calls. Here are some options:

• Airtel Call Protect: Provides spam alerts and the ability to block unwanted calls.
• Jio Caller Identification: Identifies unknown callers and flags potential spam.
• T-Mobile Scam Shield: Offers scam call identification and blocking features.
• Vi Spam Filter: Helps filter and block spam calls effectively.

Contact your carrier to activate these services and reduce the frequency of spam calls.

National Do Not Call registry – does it work

The National Do Not Call (DND) registry is a government initiative aimed at reducing unwanted telemarketing calls. Here is how you can register:

1. Send an SMS with “START DND” to your telecom provider’s specified number.
2. You will receive a confirmation message.
3. Wait for the DND service to be activated, which usually takes 7 days.

While the DND registry significantly reduces telemarketing calls, some spam callers may bypass the system by using unregistered or masked numbers. It is essential to report such calls for further action.

How to report spam calls in India (TRAI, DoT)

Reporting spam calls is a crucial step in combating this issue. Here is how you can do it:

1. TRAI DND app: Download the app and report spam calls by providing the caller’s details.
2. Department of Telecommunications (DoT): Contact the DoT via email or phone with information about the spam call, including the caller’s number and time of the call.

By reporting spam calls, you contribute to regulatory efforts to penalise offenders and reduce the prevalence of such activities.

Legal actions against spam callers (2025 updates)

In recent years, Indian authorities have taken significant steps to curb spam calls. Notable actions include:

• Imposing hefty fines on companies found guilty of violating telecommunication regulations.
• Initiating legal proceedings against individuals and organisations involved in spam call scams.

These measures aim to deter spam callers and protect consumers from harassment and fraud.

 

AI and the future of spam call prevention

Emerging technologies are playing a crucial role in combating spam calls. Here are some innovations to look out for:

• STIR/SHAKEN protocols: These technologies verify the authenticity of caller IDs, making it harder for scammers to use spoofed numbers.
• AI-powered solutions: Artificial intelligence is being used to detect and block fraudulent call patterns in real-time, offering enhanced protection for users.

As these technologies continue to evolve, they promise a more secure and spam-free communication experience.

Spam calls are more than just a nuisance; they pose significant risks to both individuals and businesses. By understanding the nature of spam and robocalls, leveraging call-blocking features on your devices, using trusted apps, and utilising carrier anti-spam services, you can effectively reduce the number of unwanted calls. Additionally, registering with the DND registry, reporting spam calls, and staying informed about legal measures and AI advancements will further enhance your protection.
 

Take proactive steps today to block spam calls and regain control over your communication channels. By doing so, you can safeguard your privacy, protect your business, and enjoy a hassle-free calling experience.