Aredwood:

chevrolux:

 

Dial 083201234 and it will repeat your number back to you.

 

I got a recorded message saying "welcome to the message exchange, please enter your mailbox number then press #".

Presume that is actually the Spark voicemail system. As I think that 083210 is the Spark voicemail number.

Dialed from an 021 number that has been ported to 2degrees.

You need to dial "083201234" on Spark not 083210. Plus 1956/1957 works on non-Vodafone mobile.

And exactly the same topic from over 10 years ago (Thanks Biddle): https://www.geekzone.co.nz/forums.asp?forumid=39&topicid=12779