It has been active on VC since 6.1, however it has been unstable if you ask me, with frequent No Service issues when the phone attempts to switch from LTE to 3G or vice versa. So I usually recommend to those with No Service issues to disable LTE for the time being.
Vodacom has recently started rolling it out to prepaid users too, in fact it should be active already, however I haven't had the chance to test it out personally yet.
Oh nice.
LTE is active on all handsets that support it or only iPhone and Samsung?
Sorry, I digress - to the OP, let us know how you get on?