The head of mobile telecommunications operator China Unicom has said he expects Apple’s iPhone to become China’s best-selling smart phone, Bloomberg reported. Chang Xiaobing’s comments come despite disappointing initial sales numbers and skepticism that official versions of the iPhone, which lack key features, will be able to draw buyers away from less expensive and fully featured gray-market iPhones. Chang admitted that sales "could have been higher," but said the company considered sales numbers so far "acceptable." He added that he expected official iPhone sales to surpass gray-market sales. Unicom says it is focusing on subscriber growth, and hopes to add 1 million subscribers to its 3G services per month.