The list of mobile devices with Netflix HDR support now consists of 11 smartphones and one tablet — namely the Samsung Galaxy Tab S3 — and the last ones to be added are the Huawei P20, P20 Pro, Mate 10 Pro, as well as the Sony Xperia XZ2. The only plan with UHD content streaming support is Netflix Premium, priced at US$13.99 per month.
https://www.notebookcheck.net/Netflix-HDR-support-now-available-for-the-Sony-Xperia-XZ2-Huawei-s-Mate-10-Pro-and-the-P20-family.303790.0.html