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US shares overnight declined, led by telecommunications sector. Sprint Nextel officially unveiled a new mobile phone able to tap into super-high speeds. Sprint Nextel rallied but all other telecom fell on competitive worries. Portugal's credit rating downgrade also weighed on the US market. Most Asian markets posted modest gains Wednesday. Japan's Nikkei index was up 0.4. China's Shanghai Composite and Hong Kong's Heng Seng Index advanced 0.1 per cent each, helped by strong corporate earnings reports. South Korea's Kospi slightly declined by 0.05 per cent.