In short: T-Mobile's Galaxy Note 9 512GB model is still not being shipped out to those that pre-ordered. This is happening three weeks after the Galaxy Note 9 started shipping. This is likely because Samsung didn't make as many 512GB models as it figured that the majority of customers would get the 128GB model. But Samsung itself is also having trouble sending out pre-orders still, from its own website. Which likely means that demand exceeded supply quite a bit for Samsung. That's both a good thing and a bad thing. It means that Samsung's Galaxy Note 9 is selling well, but it is also having some upset customers, who have not received their Galaxy Note 9 yet - and it launched back on August 24, nearly a month ago.
Background: Samsung's Galaxy Note 9 comes in either 128GB or 512GB storage models, priced at $999 and $1249 respectively. For phones that cost this much, customers are less likely to be patient waiting on their pre-order, or even their order. If the phone was around $599 or $699, they may be a bit more patient. But since the launch was nearly a month ago now, and many pre-ordered it right around the announcement date which was about five weeks ago now, customers do have a good reason to get upset with the long wait in getting their device.
Impact: If you didn't pre-order the 512GB Ocean Blue Galaxy Note 9, but want too, you may want to hold off a bit. It's likely that your order will also take a few weeks to arrive, seeing as pre-orders still haven't been 100-percent fulfilled. This could cause Samsung to lose some customers though, with the new iPhones launching this Friday, and then a slew of smartphones launching in early October. Including some from the likes of Google, Huawei, Honor, LG, Razer and more. And that would defeat Samsung's reasoning behind launching the Galaxy Note 9 back in August - to beat the iPhones to store shelves.