Call and SMS Blocker

Block unwanted calls with Telenor Call & SMS Blocker to get rid of unwanted callers.

Overall customer reviews
Product Price
Rs. 23.90/Month



Let the Telenor Call and SMS Blocker make your life easy. Block all unwanted callers and messages with our subscription based service that stops any number (021-xxxxxxx, 042-xxxxxxx, 030x-xxxxxx, 033x-xxxxxx, 032x-xxxxxxxx, 034x-xxxxxxx) from calling or messaging you.


Once you block a caller, any call and SMS from that caller cannot reach you. Instead a prompt is played to the caller on call and they are also unable to reach you over SMS.


How to block calls and SMS:

You need to SMS 'sub' to 420 to get registered. Once you are registered, you will receive a confirmation SMS a few hours later. 

Subscription Type
Send 'SUB' to 420
Send 'USUB' to 420


After confirmation, you can send the Number you want to block to 420 or use one of the following options.

Activation Text
Short Code
To add a number to Blacklist
Rs 2.00
To remove a number from Blacklist
Rs 2.00
To add a number to whitelist
Rs 2.00
To remove a number from Whitelist
Rs 2.00
To view Black list
No Charges
To Unsubscribe the service
No Charges
Switch to black active or white active mode
No Charges


This service is available on ALL prepaid & postpaid packages.

NWD & IDD Subscription:

The service blocks incoming calls and Text Messages. It works on two access levels: Nationwide Dialing (NWD), International Direct Dialing (IDD). If you have International Roaming (IR) on your number, you have to change it back to NWD or IDD and then you can subscribe to this service.

Many people around you would need this service so why not share it on your social media pages! 



Can I block a number without getting subscription?

No. First you have to subscribe to the service, by sending an SMS with text 'sub' to 420. This will create your subscription. Once you are subscribed to the service, then you can block the numbers.

Do I have to renew my subscription every month?

You can choose to unsubscribe by sending 'usub' to 420 (Free of Charge). If you don't do anything, your subscription will be renewed & RS. 20 + tax will be charged.

What happens if my subscription expires & then I re-subscribe?

We maintain the list of your blocked numbers for the next seven (7) days.When you renew, you would not need to re-create the list of blocked numbers again.

What happens if I unsubscribe & then re-subscribe?

We maintain the list of your blocked numbers for the next seven (7) days. So if you choose to come back, you would not need to re-create the list of blocked numbers again.

What if I don't have sufficient balance at the time of subscription renewal?

  • Subscription renewal is automatically attempted after thirty days – you get a notification on 27th day.
  • On 30th day if you do not have the balance of more than Rs.24, the service is de-activated.
  • You would start receiving those annoying calls again.
  • For your convenience, until you unsubscribe, the subscription is attempted every night.
  • If you have the balance exceeding Rs. 24, subscription is renewed & all those annoying calls will be blocked again.
  • Once you are re-subscribed, you do not need to block the numbers again as the list of blocked numbers is maintained at the system even when your subscription is not renewed.

What is a whitelist?

White list contains only allowed list of numbers, you will not be receiving calls/SMS except white list numbers.

How do I add numbers in whitelist?

You need to send an SMS "W 03451234567" to 420
Charges: Rs. 2+Tax only

What is a blacklist?

Numbers enlisted in black list cannot make calls/sms to you

How do I delete a number from blacklist?

You need to send an SMS "UB 03451234567" to 420
Charges: Rs. 2+Tax only

How do I add numbers to the blacklist?

You need to send an SMS "B 03451234567" to 420
Charges: Rs. 2+Tax only

Will blacklist and whitelist work at the same time?

No, you have to switch to either one of them for example if you are switched to Black list then not allowed numbers cannot make calls/SMS to you and if you have switched to White List then only allowed numbers can make calls/SMS to you.

How do I switch between black list and white list?

If you want to switch to black list then send "Switch " to 420.
If you want to switch to white list then send "Switch " to 420.
Charges: Switching is free of cost.

Can this service block outgoing calls as well?

No. This service blocks the incoming calls only

Once I block a number, what do my blocked callers hear?

They hear the default prompt of 'Busy Tone'.

While subscribing to Call Blocker, I am getting an error: "Call blocker activation failed. please deactivate International roaming and subscribe to call blocker service again or call 345 for help."

  • As you have International Roaming activated on your phone number.
  • You can not enjoy Call Blocker & IR access on your phone at the same time.
  • Simply change the access level from IR to IDD or NWD by calling 345.
  • After the access level is changed, then you can send 'sub' to 420.
    Subscription Charges: Rs.20+tax per month.

Will the usage of this Service shown on my Postpaid Invoice?

Yes, the usage of service will be shown in your Invoice.


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Average 4.0

based on customer reviews

10/23/2015 11:00 AM
This service is useful.
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