Microsoft is now offering customized versions of the Samsung Galaxy S9 and S9+ for pre-order through their store. The Microsoft Editions of the smartphones will operate on Android OS and will look identical to the flagship devices sold on Samsung's website. Microsoft's customizations will come in the form of software additions, such as Cortana, Skype, Microsoft Launcher and apps from Office 365.
https://www.notebookcheck.net/Samsung-Galaxy-S9-and-S9-Microsoft-Editions-announced.288888.0.html
Once again I am deeply disappointed that no carrier in the USA can offer a Samsung flagship phone with more than 64 GB default internal storage. It appears that the rest of the world will have 128 or 256GB internal options but not the USA. WTF.