(Telecompaper) A shortage of camera parts and substandard metal casings have forced HTC to delay the launch of its One flagship smartphone, the company's chief marketing officer, Benjamin Ho told Dow Jones. Speaking to reporters for the first time since he took over the job in January, Ho said "productivity (of the parts) is improving" but it will "take time" to ramp up production. He didn't give more details. Ho, HTC's third marketing chief in less than two years, also told reporters the Taiwanese smartphone maker plans to boost its digital marketing budget by 250 percent from last year, and double the budget for non-digital platforms as well. HTC will also work with partners such as chipmaker Qualcomm to beef up its marketing campaigns in the US, he said. HTC also plans to be more targeted in its campaign, such as advertising in stadiums when the UEFA Europa League matches are played, he added. "We will no longer focus on 'quietly brilliant' in product ads," Ho said."We have not stressed our innovation enough in the past." HTC will begin selling the One the week of 25 March in the UK, Germany and Taiwan. The HTC One will launch across Europe, North America and most of Asia-Pacific before the end of April, the company said.