All other major networks and some MVNO's have visual voicemail. For the iphone base, it's very easy as it's a one size fits all sort of thing. After being with Vodafone for 2 years, the idea of going...
kibblewhite To be honest, I have no idea what level of service you may get with that network.
Firstly, you will need to consider what Vodaphone coverage is like where you are - and then assume that Voxi gets the same service level..
I suppose you could join for a month to see what it's like and then port your number across if you find that it suits you better than Smarty.
I suppose therein point is that many of us are not too bothered about visual voicemail and find that we get a reasonable service at a good price.