Imagine a magic button that turns your Windows 10 Mobile handset into a phablet. While no phone can stretch its screen size just yet, the latest build of Windows 10 Mobile includes a feature that allows those with a regular-sized handset, to experience what it feels like to own a phablet. This is accomplished by scaling down the UI on the phone, so that the QWERTY and images on the screen are reduced in size making the screen seem larger.
If the Nokia Lumia 1520 phablet has the UI scaled down, the result is a tablet-like experience. Some of the phone apps become tablet apps, including the Microsoft Edge browser, which looks like the PC version with the UI scaled down.