Sony is said to be planning for a new Xperia handset dubbed Xperia X Premium that would succeed the Z5 Premium, the company's first smartphone to sport a 4K screen, which was unveiled at the IFA 2015 trade fair alongside flagships Z5 and Z5 Compact.

The Xperia X Premium is expected to feature what is termed as the world's brightest display. According to details shared by PhoneRadar, which it claims to have obtained from certain unnamed confirmed sources, the X Premium device will sport a 5.5in Whitemagic LCD display with full HD resolution that supports High Dynamic Range (HDR) playback. If this turns out to be true, then the X Premium would be the first in Xperia line-up to feature an HDR supported display.

The X Premium display reportedly delivers 1000 nits of white brightness and could offer a maximum brightness of up to 1300 nits. The Galaxy S7, for a comparison, offers a maximum brightness of 855 nits whereas the Xiaomi Mi 5 offers 600 nits. In addition to that, the upcoming Xperia model is expected to come with 1.07bn colour depth. It will offer 120Hz refresh rate and a contrast ratio of 2000:1.

As for other hardware features, the X Premium is expected to have similar specifications as the Xperia X Performance, which was unveiled in February at the Mobile World Congress event and is waiting for a market rollout. Expect a Snapdragon 820 chip coupled with Adreno 530 GPU and 3GB RAM inside the smartphone, driving power for it. Other key features are support for USB Type-C with higher data transfer speeds.