Sony has launched its new flagship smartphone, the Xperia XZ3, just six months after it revealed its predecessor.

The newdevice features a new 6 inch curved Quad-HD+ High Dynamic Range (HDR) OLED display.

The X-Reality engine will "up-convert" standard dynamic range images and video to near HDR.

The design has also been tweaked, with curved 3D glass blending the OLED display into the body of the phone.

However, there remains a slight bezel around the display, something Samsung and Apple have tried to eliminate from their flagship phones.

The XZ3 also incorporates new artificial intelligence features, including Side sense which learns from the users frequency, time and location habits and suggests the app needed with a side tap to the phone.

AI is also used in the Smart launch function in the camera, automatically opening the camera app when the device is held up horizontally.

Sony still hasn't gone down the dual camera route though, with the main camera on the smartphone featuring a single 19MP Motion Eye sensor.

There is also a 13MP front camera for selfies.

The camera system includes 4K HDR Movie recording, Full HD 960FPS Super slow motion and the 3D Creator feature which now with incorporates facial expressions.

Audio has also been upgraded, with the S-Force Front Surround Sound speakers now 20% louder than on the previous model. 

The device also features the haptic based Dynamic Vibration System introduced to the XZ2, that adds vibration to audio such as music, movies and games.

An IP65/68 rating means the XZ3 is certified water resistant and it is powered by the Qualcomm Snapdragon 845 chip.

The phone will come in a choice of four colours - Black, White Silver, Forest Green, and Bordeaux Red - and will be available next month, with pre-orders opening soon.

The announcement was made at the IFA technology trade show in Berlin, where Sony also revealed a range of other new products.

These include new noise-cancellation and premium headphones, a new portable party speaker, a fashion watch and the integration of the Amazon Alexa virtual assistant into a range of existing products.