The Sony Xperia Z4 Compact, the smaller iteration of the Sony Xperia Z4, is expected to be launched on 13 May.

According to the report, the Xperia Z4 Compact has the model number of SO-04G and was part of NTT DOCOMO's summer offering. The Sony Xperia Z4 Compact handset, along the Sony Xperia Z4 Ultra (C6800 series), was also spotted in an Indonesian Telecom regulatory list last month.

The Sony Xperia Z4 is expected to come out sometime Q2 or Q3 2015 in other regions, but has already made its debut in Japan.

The shatter-proof, dust-proof, and water-resistant 4.7-inch Sony Xperia Z4 Compact will also support multi-touch (up to 10 fingers).

Behind its Android 5.0 (Lollipop) OS is a Qualcomm MSM8994 Snapdragon 810 chipset are two CPUs, a Quad-core 1.5 GHz Cortex-A53 and a Quad-core 2 GHz Cortex-A57, and an Adreno 430 GPU.

The Sony Xperia Z4 Compact has 3GB RAM - and two internal memory options, a 32GB and a 64GB, which are expandable via microSD of up to 128GB.

It has a 20.7MP, 5248 х 3936 pixel main camera and a 5MP front clicker. The rest of the specs of the Xperia Z4 Compact are the same as with the already-released Xperia Z4.

Finally, a non-removable 2930mAH Li-Ion battery provides power to the unit. The Xperia Z4 Compact is initially available in black and white variants.

While there have been no official announcements from Sony, leaks have come out that there appears to be three versions of the Sony Xperia Z4, the last one being the Sony Xperia Z4 Ultra.

One of the supposed documents observed and pointed out that the names registered E5803, E6683 and E6803 are similar to the previous Z3 Compact (model D5803) and two previous Ultras (C6683 and C6803).

With the Sony Xperia Z4 Compact finally arriving, having an Ultra is certainly not that far off. For now, everyone is hoping that both the Sony Xperia Z4 Compact and the Sony Xperia Z4 will be released worldwide.