First rumors informed that Samsung planned to present officially new phone from Galaxy Note series during the latest days of July, but now we're sure that plans were changed. How we can read on some websites Samsung decided to make a change in design of Samsung Galaxy Note 9, and that's why South Korean company had to change date of Note 9's presentation.

Decision about changes in design were determined by Samsung’s Vice Chairman Lee Jan-Yong after his visits in many local stores in Shenzhen. In his opinion phones produced by other firms offer increased feeling of grip in comparison to Note 9, and he decided that Samsung must reduce thickness of display glass by 0.5mm in Galaxy Note 9. However, premiere of new Samsung's phone won't be significantly delayed, because smartphone's presentation after making all changes is planned for August.

source