The common telemarketing and scam telemarketing calls which bother people daily have become an ongoing problem. The increasing occurrence of robocalls together with the rising number of data breaches makes it seem impossible to stop these calls altogether. The combination of proper settings together with specific apps and your daily routines will enable you to achieve almost complete success in blocking unwanted calls.
Enable Built-In Spam Protection

Most smartphones have built-in spam filters. Users should activate spam protection in the Phone app for Android devices while iPhone users should choose to enable “Silence Unknown Callers.” The system will automatically handle phone calls from suspicious contacts by either blocking or silencing the calls.
Register on Do Not Disturb Lists

In India, people who register their phone number on DND (Do Not Disturb) services experience a major decrease in telemarketing calls. The system will filter out actual marketing calls while it does not eliminate all spam.
Use Call-Blocking Apps

Truecaller and similar applications operate by locating and blocking spam calls through their extensive collection of documented telephone numbers. User reporting of spam content enables forward progress for system improvements.
Block Unknown Numbers Manually

The system enables you to stop all calls from people who keep calling you by implementing direct number blocking. The method functions as a basic solution which helps to stop unwanted calls from occurring multiple times.
Avoid Answering Unknown Calls

Spam telephone calls become more frequent when people pick up these calls because their responses verify that their phone numbers work. You should send unknown calls to voicemail.
Don’t Share Your Number Publicly

People should not put their phone number information on social media platforms and websites. The primary method which generates spam calls involves data scraping.
Report Spam Numbers Regularly

When users report spam numbers it results in better database performance. The collected information enables applications and telecom companies to block future telephone calls which will benefit all users.
Enable Carrier-Level Filters

Telecom companies provide spam filtering solutions which block suspected spam calls before they arrive at your device. The service enables users to block all known spam callers before their calls reach the user’s phone.
Use Separate Numbers for Sign-Ups

The use of a second phone number is recommended for all online registration and delivery and service needs. This method helps you maintain confidentiality by protecting your main contact number.
Be Careful With OTP and Links

The scam phone calls attempt to obtain your one time passwords and your private details. You should never disclose any confidential information during phone calls because the caller may present themselves as an authentic person.