UPDATE 3-Nokia's quarterly profit beats on 5G demand

* Net sales up 2% to 5.4 bln euros vs 5.3 bln last year

* Profit up to 633 mln euros from 486 mln last year

* Chip supply issues to affect Q4, CEO says

* 5G market growing, couple of years before peak - CEO

* Shares up 5% (Adds shares, comments from CEO interview)

By Essi Lehto and Supantha Mukherjee

HELSINKI/STOCKHOLM, Oct 28 (Reuters) - Nokia reported a stronger-than-expected third-quarter operating profit on Thursday on higher demand for 5G gear, but warned the global shortage of semiconductors would hit its supply chain.

Shares of the Finland-based company were up 5% as investors lauded its efforts to get back on track following product missteps last year by riding on 5G demand and taking market share away from rivals, particularly in China.

Any problem in supplying to customers on time might dent those ambitions.

"At the moment, we are limited by semiconductor availability, that will affect Q4 and it's quite possible that this challenge will get bigger before it starts getting better," Chief Executive Officer Pekka Lundmark said in an interview.

Global producers of goods from televisions to cars have faced a host of supply chain issues ranging from a shortage of vital components, manpower, logistics snarls, and delays at plants because of power cuts in China.

Rival Ericsson https://www.reuters.com/technology/ericsson-profit-beats-expectations-5g-demand-despite-china-setback-2021-10-19 last week also warned of supply chain issues.

"We are working every single day with the suppliers on all levels of the organisation and I have also been personally involved in these discussions," Lundmark said.

Nokia's quarterly net sales rose 2% to 5.4 billion euros ($6.27 billion) from 5.3 billion a year ago, in line with analysts' expectations.

The company expects comparable operating profit margin to be towards the upper end of the target range of 10% to 12%.

Comparable operating profit during July-September surged to 633 million euros from 486 million last year, beating the 488 million euros forecast by 11 analysts polled by Refinitiv.

While its mainstay mobile network business suffered from lost business in the United States, network infrastructure grew 6% in constant currency and cloud and network services rose 12%.

"The 5G market is still growing and we expect that it will still take a couple of years before it reaches its peak," Lundmark said

In July, Nokia won its first 5G radio https://www.reuters.com/technology/nokia-wins-first-5g-radio-contract-china-2021-07-19/#:~:text=STOCKHOLM%2C%20July%2019%20(Reuters),up%20in%20a%20political%20spat contract in China, while rival Ericsson lost market share after Sweden last year decided to ban Chinese vendors from their 5G networks.

Lundmark said revenue from China has started to flow in but the available market there for non-Chinese vendors was limited.

($1 = 0.8618 euros) (Reporting by Essi Lehto and Supantha Mukherjee, Editing by Terje Solsvik, Sherry Jacob-Phillips and Barbara Lewis)