Apple (AAPL) has yet to begin final production of its new, upcoming iPhone X, according to Raymond James analyst Christopher Caso following a recent trip to Asia.

Caso wrote that the delays could push back shipments of the smartphone, scheduled to go on sale October 27, until December.

"Interestingly, while the industry widely anticipated a shift in iPhone ramp timing, our checks suggest there was an incremental delay in the build plans - with orders firmed up as recently as last week - shifting production more into the December quarter," Caso wrote in a note obtained by Barron's.

Caso adds that final production could be suspended for about another month or even later, compared to previous expectations.

"Notably, this is consistent with commentary from Diodes last week suggesting the timing had changed since reporting June quarter results and is important as it relates to tone and expectations for the December quarter," Caso wrote.

Shares of Apple closed lower over 1.6% on Wednesday. 

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