Sony launched their new range of smartphones at MWC this year, with the Sony Xperia 1 being the new flagship device running a Snapdragon 855 chipset with an elongated 21:9 display running at 1644 x 3840 pixels.

The other models sit somewhere in the mid-range with the Xperia 10 Plus using the Snapdragon 636 and the Xperia 10 using the Snapdragon 630. both devices have the same ultra-wide 21:9 display the flagship does but at a lower resolution of 1080 x 2520 pixels.

It is now rumoured that Sony are padding out the product lineup with the Xperia 4 which will sit in the upper mid range of the market and use a Snapdragon 710 processor.

Just like the Xperia 10 models this new device will have a 1080 x 2520 pixel display however this will be physically smaller at 5.7-inches.

Other rumoured specifications for the Xperia 4 suggest 64GB of internal storage and 4GB of RAM. A 2,800mAh battery could also be featured, this is a very small battery by current standards, but the display is smaller than average so battery life could be OK.

For optics, the phone shall most likely feature dual rear camera setup while there is no information concerning the front camera.

One of the highlights of the rumours includes the missing 3.5mm headphone jack.

At the moment I would take this release rumour with a pinch of salt, the Snapdragon 710 was originally intended for phones targeting the Asian market, but the Nokia 8.1 uses it too. The naming scheme and size of the phone is a little confusing with all the other models featuring 6-inch or greater displays. However the Sony Xperia Compact models have all been quite popular with users so it could be the new Xperia 4 is aiming to fill this slot.