So, what if one Xperia isn't big enough but the other is a tad too much? Well, you come up with something in the middle. Enter the 5.5" Xperia XA1 Plus, which is perfectly bridging the gap between the 5-inch XA1 and the 6-inch XA1 Ultra
Source: https://www.gsmarena.com/sony_xperia_xa1_plus-review-1666.php
