This happens in most countries - I think it's Vodafone in the UK which reads out the recipient's phone number very slowly before letting you leave a voicemail.
It goes something like "Welcome to the Vodafone voicemail messaging service for 0... 7... 7... 4... 5... 9... [the rest of the number]... the person you have called is unable to answer the phone right now. Please leave a message after the tone."
Call me presumptuous, but I know the number of the person I've just called, and don't really need to know how to use an answerphone.
It goes something like "Welcome to the Vodafone voicemail messaging service for 0... 7... 7... 4... 5... 9... [the rest of the number]... the person you have called is unable to answer the phone right now. Please leave a message after the tone."
Call me presumptuous, but I know the number of the person I've just called, and don't really need to know how to use an answerphone.