Sony Corp., seeking to counter a slowdown in its smartphone business, introduced a top-end Xperia phone and a cheaper model in a bid to take a share in a market that has become increasingly crowded.

The Xperia Z2 combines 4K high-definition video recording, built-in noise reduction and a 5.2-inch display and will start shipping next month, Kunimasa Suzuki, head of Sony Mobile Communications, said Monday at the Mobile World Congress in Barcelona. Sony also updated its Xperia tablet and showed the Xperia M2 phone with lower specifications.

Sony, which has forecast a $1.1 billion loss and is cutting 5,000 more jobs, is battling shrinking demand for TVs and personal computers as consumers switch to mobile devices from Apple Inc. and Samsung Electronics Co.