I've read various people having this same issue. I recently moved from ee to id mobile and so trying to set up answering machine. It says to enter a pin tried all my memorable dates, codes, pins all not acceptable, tried 0000, 000000, 123456789, 987654321, and lots of other obscure combinations including complete random selection and all unacceptable
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answer machine pin
Best answer by WelshPaul
You need to enter a pin followed by the pound key (#).
FYI - I still got an error, but I found entering a pin followed by the pound key as quickly as possible resulted in my pin being successfully saved.
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