Foldable phones are extremely new and we haven't seen many different form factors yet. The Samsung Galaxy Fold is the only foldable on the market and it has a form factor similar to a book. The display is on the inside and it opens to the size of a small tablet. We've known Samsung is working on more foldable devices and they just teased a vertically folding Galaxy Fold at SDC19.

At the Samsung Developer Conference today, the company teased a new form factor for foldable phones. In the GIF below, you can see a tall screen that folds vertically, like an old flip phone. This is a completely different approach than the original Galaxy Fold. Instead of a phone that turns into a tablet, this is an easily pocketable device that turns into a larger phone.

This new Galaxy Fold is allegedly model number SM-F700F and it could be the rumored 256GB foldable we've heard about. According to our own Max Weinbach, software development may have started this month already.

As mentioned, there have been rumblings of Samsung working on new Galaxy Fold form factors. Earlier this month, a leaked poster from a Chinese carrier showed the silhouette of a foldable phone said to be the "Samsung W20 5G." With Samsung's teaser today, that poster looks a little more real. It could also be an entirely different device, though, so we'll have to wait and see.

Going from phone to tablet, like the original Galaxy Fold, is handy for some people, but this vertical form factor is arguably more exciting. Anyone who used an old flip phone will tell you how nice it was to carry around such a small device. Packing a big screen into that form factor would be great. Motorola is another company that seems to be working on this concept. We're excited about foldable phones in 2020.