What is Call Replay?

Over the last 2 years, I’ve been aware of periodic complaints from customers on different mobile networks who claim their calls have been recorded.  The customers report that during the call they notice they aren’t hearing live audio from the other party, but a recording, replaying audio content from earlier in the conversation.  I have experienced it myself and remember thinking the other party was repeating himself but then realising I was hearing exactly what he had said previously, and in fact the call content was being replayed.

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