How To Lock BSNL Landline
- To REGISTER a secret code (eg: secret code-1234)- Dial: 123-1234-1234 then wait few minutes for acceptance tone then disconnect. Your code is registered.
- Lock All STD/ISD call- Dial: 124-1234-1 then wait few minutes for acceptance tone then disconnect. Now STD/ISD calls will be barred .
- Lock STD/ISD/Manual trunck calls- Dial: 124-1234-2 then wait few minutes for acceptance tone then disconnect. Now STD/ISD/manual trunck calls will be barred.
- Lock Local calls- Dial: 124-1234-4 then wait few minutes for acceptance tone then disconnect. Now Local calls will be barred.
- Unlock All STD/ISD call- Dial: 124-1234-0 then wait few minutes for acceptance tone then disconnect.Now STD/ISD calls will be unbarred.
- Unlock STD calls only- Dial: 124-1234-3 then wait few minutes for acceptance tone then disconnect.Now STD calls will be unbarred.
- Unlock Local calls only- Dial: 124-5555 1 or 2 then wait few minutes for acceptance tone then disconnect.Now Local calls will be unbarred.
- Change Secret Code- Suppose you want to change current code 1234 to 4321 then Dial 123-5555-4444 then wait few minutes for acceptance tone then disconnect.
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