England chase 147 to beat South Africa in the second Twenty20 in Paarl and wrap up the series with a game to spare.
Australia beat India by 51 runs in the second ODI to take an unassailable 2-0 lead in the three-match series on Sunday.
Glenn Phillips 108, Conway 65* took New Zealand to 238 before restricting Windies to 166/9.
Jonny Bairstow made his mark yet again, this time with an unbeaten 48-ball 86.
Electing to bat, Australia posted an imposing 374 for six with skipper Aaron Finch and top batsman Steve Smith smashing hundreds.
New Zealand ended their seven-match T20I losing steak, chasing down 176 with four ball remaining.
England announced a three match ODI series against Sri Lanka, three 50-over matches and three T20s against Pakistan.
England to visit Pakistan for first time in 16 years in 2021 for two T20 matches before T20 World Cup.
Williamson, Boult rested for T20Is against West Indies as NZC announces squads
Mumbai Indians beat Delhi Capitals to clinch IPL 2020 Trophy, register fifth title win in 8 years.