Nokia has unveiled the N8 - its first smartphone to use the Symbian ^3 OS, which will be out in the third quarter.
The Finnish company has promised Symbian ^3 phones will be easier to use than their predecessors.
The N8 will be the first in a family of smartphones based on Symbian ^3 that will be out in 2010, according to Nokia.
The N8 is a pivotal device in Nokia's effort to make its high-end phones credible again, according to CCS Insight.
Much has been made of Nokia's deficiencies in the high-end smartphone segment because the Symbian OS development hasn't kept up with the touch-based user interfaces offered first by the iPhone OS and then Android.
However, Symbian ^3 is going to change that, according to Nokia.
The new OS will allow customisable home screens, support for multitouch, single tap and faster multitasking. The N8 will also provide integration with social networks.
The improvements will help Nokia catch up with Apple and Android-backers like HTC and Motorola, but there is little that will set Nokia apart, according to Carolina Milanesi, research director at Gartner.
Nokia's biggest challenge will be to get users to pick up the phone and play with it, because the user interface looks just like the existing version of Symbian, which so many users dislike.
It is only by using the new OS that the improvements can be seen, Milanesi said.
On the hardware side, the N8 will come with a 3.5in touchscreen, a 12Mp camera with a Xenon flash and support for video recording at 720p.
Other video features include an HDMI port to connect to a TV and support for Dolby Digital Plus surround sound, according to Nokia.
Users will be able to surf the web using 802.11n, which is becoming increasingly common on new smartphones. The phone will have 16GB of memory and a micro SD card.
The N8 is expected to cost €370 (£320), before taxes or subsidies.
Originally, it was supposed to show up in stores during the second quarter. The delay was announced last week when Nokia presented its first-quarter results.
Shipping the phone by the second quarter was an aggressive target, according to Geoff Blaber, analyst at CCS Insight.
The delay gives the Apple and Android camps more time to develop their respective operating systems, solidifying their positions in the high-end smartphone sector, Blaber said.
The Symbian Foundation, which began operating in the first half of 2009, now develops the operating system and has always said that the firstSymbian ^3 phones would be out in the second half of this year.
Nokia continues to be Symbian's biggest supporter.