Muutkin tuntuu tykkäävän 6230:sta. Harmi vaan, että Norsun toimituskyky tökkii. Mistäköhän komponenenteista on pulaa? LONDON -- Nokia Corp. is unable to meet demand for one of its most popular phone models, undermining the world's largest cellphone maker's efforts to reverse its recent steep decline in market share. A Nokia spokesman said the company hasn't been able to secure components quickly enough to keep up with demand for the Nokia 6230 model, which has a built-in camera. "Demand has been significantly higher than we expected," he added. The U.K. online store of Vodafone Group PLC, Europe's largest service provider, was listing the Nokia 6230 as "out of stock" Wednesday. A spokesman for Vodafone wasn't able to comment immediately. All three of the cellphone shops in central London surveyed by the Wall Street Journal were also out of stock on Wednesday and the model has been in short supply since early July, according to sales staff. While the Nokia 6230 is a much-needed hit product for Nokia, the component shortages may prevent the Espoo, Finland-based company from fully capitalizing on its popularity. Cellphones are quickly superseded by more advanced models and Nokia's competitors are promising to launch dozens of new models in the fall. The Nokia 6230, which also has a built-in music player and FM radio, was one of the company's best-selling products in the second quarter, according to both Nokia officials and market researchers. Launched in March, the black, candy bar-shaped phone has beefed up Nokia's portfolio, which had lacked competitively priced camera phones with sharp color screens. While they await new stock of the Nokia 6230, the cellphone shops in central London have been trying to sell customers rival products from alternative suppliers. But sales staff in these shops said many customers have chosen instead to put their names down on waiting lists for the Nokia 6230. The Nokia spokesman said: "Hopefully we will be able to meet demand as quickly as possible."