Sony Xperia XA3 is an odd phone as it will feature a brand new display aspect ratio for a smartphone which is 21:9. It is the same aspect ratio that you can find on the Sony Xperia XZ4 flagship.
The smartphone is expected to have a 2560×1080 resolution which is why the smartphone is tall and the smartphone is expected to have a display of 5.9-inch.
The smartphone is expected to have a Snapdragon 660 chipset and it will have a 6GB of RAM and 64GB of internal storage.
Source: Winfuture.de