The Economic Times claims Apple has resumed iPhone 4 production in response to sliding sales in emerging markets. The Cupertino company will presumably market the device as a low-cost option, and focus on markets such as India, Indonesia and Brazil. Shipments of iPhone 4 models bearing manufacturing dates of December 2013 were reportedly spotted passing through these markets recently, lending credence to the rumor; more stock, produced in January, was also recently shipped, the report says.