UPDATE 3-Sony Ericsson posts heavy Q1 loss, slashes jobs

* To cut 2,000 more jobs this year

* Sees some signs of stabilising demand

* To take further 200 mln euros in charges

* Posts Q1 loss in line with March warning

(Adds background, quotes)

By Mia Shanley

STOCKHOLM, April 17 (Reuters) - Mobile phone maker Sony Ericsson said on Friday it plans to cut one in five jobs this year in its battle to return to profit as a sluggish market brought a hefty first-quarter loss, as expected.

The world no.4 handset manufacturer, owned by Sweden's Ericsson (ERICb.ST) and Japan's Sony Corp (6758.T), plans to slash 2,000 jobs this year after shedding a similar number in 2008.

The company shed a quarter of its market share to 6 percent year-on-year but said it saw signs of a stabilisation in demand, echoing comments made by top cellphone maker Nokia (NOK1V.HE) a day earlier. [ID:nLG183354]

"In March there were signs of stabilisation ... in the U.S. and in Europe," CEO Hideki Komiyama told Reuters in an interview.

"Still, in some areas we still have weakness, in Eastern Europe, in Russia, the Middle East and India, but some other areas have clearly started seeing some signs of correction."

The company's pretax loss of 370 million euros ($485 million) - against analysts's forecasts of 371 million - came a day after Nokia reported its first-ever quarterly loss.

"What should Sony Ericsson do to get out of this slump? They are not big enough to compete with Nokia, and now we have the iPhones. I don't think they should go after all segments of the market," said Michael Andersson, analyst at Evli.

Sony Ericsson's success has been built on a strong offering of mid-range phones with high-quality cameras and music players, but this market segment has seen a sharp fall in demand as operators have doled out subsidies to more expensive phones.

"Imaging and music are now part of most of the competitors' portfolios and Sony Ericsson is finding it more and more difficult to have its products stand out," said Gartner Research Director Carolina Milanesi.

Because of the economic downturn consumers are increasingly selective about their mobile phone purchases and upgrades.