Vodafone currently only use SMS notifications as the default VM notification. They have never used the VM notification envelope and it's actually not very common anywhere.
Their network does support it and it is possible to get it switched on but I'm not sure what the official channels of contact are for this.
hasole: so it is a carrier feature like the network operator time
Kind of. The VM notification was never part of the original GSM 900 spec so very old GSM 900 only handsets didn't support it. It was introduced along with the GSM1800 spec and virtually every handset in the market would now support it. It's actually just a SMS message but the phone handles it differently. Vodafone have supported it for some time but couldn't just enable it by default because it could break on some really old handsets and some people simply may not like it.
I've had this on my phone for some time and prefer it because it's impossible to "forget" about VM's if you read the SMS but are too busy to call back immediately. The downside is you don't get individual notifications of the number of messages and at present the SMS notifcation seperates faxes and VM's in your VM box whereas the VM icon can't do this.
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