More than 26 million mobile phone calls and 15 million international calls were made during the five-day handover holiday period. The numbers fall far short of the record-breaking surge during Typhoon Kent in 1995, when 32 million calls an hour jammed Hongkong Telecom's system. To avoid a repeat of the problem, the company upgraded its system and put in place contingency measures in case cable or satellite links were overloaded. It said yesterday the mobile phone usage was 23 per cent higher than the last public holiday, the Dragon Boat Festival on June 9. Calls to and from China took up about 30 per cent of the international traffic and Beijing alone saw a 20 per cent increase in calls compared with Lunar New Year. Many outgoing calls were also made to the Philippines, the US, Britain, Taiwan and Japan.