Flip state you you need a VDSL2+ modem if you want to connect to their VDSL service in their "Buy or BYO modem" area. https://flip.co.nz/what-you-need-to-know/
In addition they say they can sell you one here. http://support.flip.co.nz/hc/en-gb/articles/204734070-What-type-of-modems-do-Flip-offer-
I've had a client ask me about this, and my research shows that no such animal exists yet. Maybe I'm too old and got this all wrong?
I thought Chorus provide VDSL2 and that's what Flip are reselling? Has some marketing guru got ADSL2+ and VDSL2+ mixed up maybe?