Perhaps Steve Jobs should have talked to the Porsche design staff about antenna problems before pushing forward with the new iPhone design. It seems the brand was also haunted by the same nightmare three years ago when developing its own mobile phone. 'We could have shared some tips if Apple asked us about the antenna problems,' said Juergen Gessler, chief executive of the Porsche Design Group. 'We had the same issue when we first developed it.' Gessler threw a media lunch on Friday at Central's Otto e Mezzo restaurant to introduce the brand's products - from sneakers to stationery and luggage. The mobile phone, however, appeared to be the most talked about item at the event owing to the recent launch of the iPhone4 in Hong Kong. While the Porsche phone problem was eventually solved by adding a plastic frame towards the bottom of the phone, Gessler is still cautious about entering the smartphone market. 'This is a difficult business area. The technology is developing so fast to enhance mobile phone functionality. But at the end of the day, why would we want more functions other then making phone calls?'