Citing sources in the "flat panel supply chain," they report the "smartphone is still under its engineering verification test (EVT) period due to issues related to its mobile platform."
There's still no proof that Amazon is even working on a smartphone, much less that it will be coming out this year, but that doesn't stop some from believing every crazy rumor spouted by Digitimes:
Market rumors have indicated that Amazon may not be able to release its first smartphone in the second quarter of 2013 as originally scheduled, as the production progress at its manufacturing partner, Foxconn International Holdings (FIH), has not been as smooth as expected, according to sources at the flat panel supply chain.
For the record. this rumor has been circulating in one form or another since May 2012, and it keeps cropping up again every few months. I don't believe today's rumor any more than I believed the past rumors.
Pull the other one; it has bells on.