First official iPhone 5S sold in China

Retail debut follows deal with China Mobile to sell the smartphone

Apple Inc Chief Executive Officer Tim Cook on Friday drummed up iPhone 5S sales in Beijing by shaking hands and giving out signatures to customers at an outlet of China Mobile Ltd, his new Chinese partner.

Yet whether Cook's common touch will turn into sales growth remains a question after research firms warned the nation's increasing desire for smart devices will start subsiding this year.