In Short :- To block telemarketing calls, register with the National Customer Preference Register (NCPR), activate DND services through telecom operators, and use Android's built-in spam filter feature.

Spam calls, often from telemarketers, robocallers, or scammers, interrupt daily activities and can lead to scams. However, it’s not enough to ignore them or keep your phone silent. You should also avoid turning on DND mode to avoid missing important calls from delivery companies or others.

Here is a short guide on how to block spam calls on Android Devices:

To block spam calls, register your number with the National Customer Preference Register (NCPR), formerly known as the National Do Not Call Registry (NDNC), which allows users to opt-out of receiving telemarketing calls.

Activating DND Service

• Open SMS app, type “START” and send to 1909.
• Receive categories with unique codes for blocking calls.
• Respond with code for desired category.
• Receive confirmation and DND service activates within 24 hours.
• Blocks unsolicited commercial calls without affecting essential alerts.

Activate DND service by telecom operators

Activating DND Services via Telecom Providers

• Jio: Go to MyJio app, select categories to block.
• Airtel: Visit airtel.in/airteldnd, enter mobile number and OTP.
• Vi (Vodafone Idea): Visit discover.vodafone.in/dnd, enter details.
• BSNL: Send “start dnd” to 1909, select categories.

Manual Blocking of Spam Calls on Android Phone

• Open Phone app, go to call history.
• Tap and hold spam contact.
• Select “Block” or “Report.”
• Limitations due to frequent number changes.

Filtering Calls From Unknown Numbers

• Open Phone app.
• Tap menu icon.
• Go to Settings.
• Select “Caller ID & Spam.”
• Toggle “Filter spam calls” and “See caller & spam ID.”
• Silence calls from noncontact numbers.

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