A woman walks past a Nokia advertisement board at a home appliances store in Shenyang

 
A woman walks past a Nokia advertisement board at a home appliances store in Shenyang
A woman walks past a Nokia advertisement board at a home appliances store in Shenyang, Liaoning province December 6, 2012. Apple Inc shares tumbled more than 6 percent on Wednesday, chalking up their biggest single-day loss in four years as fears grow about intensifying competition in the mobile device market. Analysts also cited fears about a hike in the capital gains tax in 2013 in the event that ongoing Washington fiscal negotiations fail, as well as news that Nokia had beat Apple to the punch by striking a deal to sell its flagship Lumia through China Mobile, that country's largest wireless carrier. REUTERS/Stringer