Nokia has unveiled its first phablets - extra-large phones - as well as its first tablet computer.

The Windows Phone handsets introduce the ability to change which objects in a photo are in focus after it is taken.

The Windows RT tablet has a 4G data chip, unlike Microsoft's recently unveiled Surface 2.

Nokia World in Abu Dhabi is likely to be remembered as the Finnish firm's last major event before it completes the sale of its hardware unit.

Microsoft agreed to buy the business for 5.4bn euros ($7.4bn; 4.6bn) in a deal which the companies have said should be finalised by early 2014.

Nokia's former chief executive Stephen Elop, who resigned to become head of the company's devices and services division until his transfer to Microsoft, admitted to the BBC that choosing Windows Phone rather than Android as an operating system had presented the company with "a very difficult challenge."

"It's been hard. It's a very difficult challenge; it's a very competitive environment, but we're pleased with the fact that we're building momentum," he said.

One analyst said the sale should aid the US firm's efforts to promote its mobile platforms against the market leaders, Google Android and Apple iOS.

"For the last two years Microsoft and Nokia's marketing efforts have jarred against each other at times - having one big effort should be better than two smaller ones," said Martin Garner, from the consultancy CCS Insight.

"Microsoft can also spend a lot more marketing the devices than Nokia could. That does seem to be a key criteria - both Samsung and Apple's spends are very high indeed."

BBC News