![BSNL introduces free call forwarding facility in Kerala 1 bsnl-logo](https://www.mobigyaan.com/images/stories/BSNL/bsnl-logo.jpg)
This STV can be availed through SMS or CTop-up.
To activate through SMS, users have to send an SMS in the format STV21 to 53733
This STV can be availed through SMS or CTop-up.
To activate through SMS, users have to send an SMS in the format STV21 to 53733
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