Can I record a phone conversation without the other person's consent and use it as evidence in court?

Recording a telephonic conversation without the other party's knowledge is a likely breach of their right to privacy. But, if the recording is relevant and bears a material fact in the establishment of the case in the court, it can be admitted as evidence. Courts in India have admitted such evidence, though subject to non-tampering and proof of its authenticity. The legality of the recording can still be questioned on the basis of circumstances.