What is "Do Not Disturb" (DND) service and how does it relate to unwanted calls/SMS?

[muskanhossain]

Do Not Disturb" (DND) service is a feature offered by mobile operators to block promotional SMS and calls. Here's how it relates to unwanted communications:

Blocks Promotional Content: DND primarily stops promotional SMS and calls from your operator and their partners.

Activation: You can activate DND by dialing specific USSD codes:
Numerous apps available on the Google Play Store (for Android) and Apple App Store (for iOS) offer advanced call blocking features, often using community-sourced data and AI to identify and block spam, robocalls, and fraudulent calls. Popular examples globally, also used in Bangladesh, include:

Truecaller: Identifies unknown callers, blocks spam and scam calls based on a large community database, and provides SMS fraud protection.
Hiya: Specializes in identifying and blocking spam and fraud calls.
Call Control, Should I Answer?, Calls Blacklist: Other apps with various features like customizable blacklists, whitelists, and scheduled blocking.
How to use them:

Download and install the app from your device's app store.
Follow the app's setup instructions, which usually switzerland phone number list involve granting necessary permissions (like access to your call log and contacts).
Configure the app's settings to your preference (e.g., automatically block known spam, send unknown numbers to voicemail, or only warn you). On iOS, you usually need to enable the app under Settings > Phone > Call Blocking & Identification.
By utilizing a combination of your smartphone's built-in features, your mobile operator's services, and reputable third-party apps, you can significantly reduce the number of unwanted calls you receive.
Grameenphone: *121*1101#
Robi/Airtel: *7#
Banglalink: *121*8*6#
Teletalk: *155#
Limitations: DND might not block all spam, especially from third-party scammers or international numbers. For those, report directly to your operator.

Reporting Spam: For persistent spam, report to your operator with the spamming number, date/time, SMS content (if applicable), and a description of the call. You can contact them via:

Customer service helplines (121 for most operators).
Social media/live chat/email.
Customer care centers.
BTRC: If your operator doesn't resolve the issue, you can escalate to the BTRC through their website or customer service.