[magellan]

"Recording conversations would be a very useful tool in a cell phone. Why isn't it there"

Uh, legal reasons? Not every state has single-party consent in its laws.

[marktwain]

“Uh, legal reasons? Not every state has single-party consent in its laws.’

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No, but most do, and it is not up to cell phone manufacturers and cell phone companies to enforce state law. The capability already exists to record. For some reason, cell phone manufacturers have made it inconvenient.