Lock/Unlock Codes For BSNL Land Line Users

Last updated on By Mohsin Patel in Mobile Phones Tips

How To Register Secret Code.
Suppose you want to make 5555 your secret code.Follow this procedure:
Dial 123 5555 5555 then wait for the acceptance tone then disconnect. Your code is registered.

How To Change Secret Code.
Suppose you want to change current code 5555 to 4444 then Dial 123 5555 4444 then wait for the acceptance tone then disconnect. Your new code(4444) is registered.

•How To Bar/Open Facilities using Secret Code

1.Bar STD/ISD calls (lock) Dial 124 5555 1 then wait for the acceptance tone then disconnect. Now STD/ISD calls will be barred .

2.Open STD/ISD calls (unlock) Dial 124 5555 0 then wait for the acceptance tone then disconnect. Now STD/ISD calls can be made.

3.Bar STD/ISD/manual trunck calls (lock) Dial 124 5555 2 then wait for the acceptance tone then disconnect. Now STD/ISD/manual trunck calls will be barred . (It will also bar calls to 95 level).

4.Open STD calls only (unlock) Dial 124 5555 3 then wait for the acceptance tone then disconnect. Now STD calls can be made.

5.Bar local calls (lock) Dial 124 5555 4 then wait for the acceptance tone then disconnect.

6.Open local calls only (unlock) Dial 124 5555 1 or 2 then wait for the acceptance tone then disconnect. Now Local calls can be made.

If you have more Lock/Unlock codes,please write here by comments..also Dn’t forget to subscribe us by Email for Latest BSNL MOBILES/LandLine tricks.

ABOUT Mohsin Patel

Software Developer from Bharuch.Gujarat working as a .NET developer. and a Part time Blogger.My areas of Interest are Web Development,Wordpress and SEO,Blogging

7 Comments

  1. ratan

    i want bsnl landline lATEST lock/unlock code,,,,,,,,,,,,,

  2. K.S.Vaidya

    I want to know procedure to lock/unlock landline phone

  3. MANJUNATH K ADIGA

    I WANT TO KNOW PROCEDURE TO UNLOCK STD CALLS.

  4. Bakulaben H Mistry

    for my land line no. 02642 248759(Bharuch) earlier I was using STD lock facility. Earlier said facility was discontinued by BSNL. Recently while trying for the same, I am not getting desired tone even after opting detailed procedure for changing my std lock code. Please suggest suitable procedure to put back in to operation std lock facility once again.

  5. shreya

    I registered the code… there was an acceptance tone… then i locked the std … but even then std calls where possible … can you please tell me why??? and how to lock my std ?

  6. Sen

    I want to know how to lock ISD but unlock STD always.

  7. gurlal

    Bsnl balance transfer trick doesn’t work