It's being reported today in a new supply chain report that "Sales performance of major suppliers in the iPhone 6s device supply chain is likely to stay flat in the first half of 2016 due to decreased orders from Apple."
Among major suppliers, flexible PCB makers Flexium Interconnect and Zhen Ding Technology Holding, lens module maker Largan Precision, chassis maker Catcher Technology and OEMs Foxconn Electronics and Pegatron, have been suffering declines sequentially of their monthly revenues since November 2015, the sources indicated.
Most of these suppliers were behind the phenomenal sales of the iPhone for years and the temporary lull will be replaced when Apple begins to hand out contracts for iPhone 7 parts.
The DigiTimes report further stated that "Although Apple is expected to launch a 4-inch model, tentatively named iPhone 5se, in the first half of 2016, new contract orders for the new model would not be sufficient to make up the shortfalls caused by the decreased orders for iPhone 6s devices."
The last part of the report is of course pure speculation, as the success of the new 4" inch model is a complete unknown at this time.