We’re not going to officially know how iPhone 7 sales are holding up until Apple releases its earnings report for the holiday quarter this coming January. In the meantime, we’ve seen some speculative evidence which suggests that overall iPhone sales, while certainly solid, aren’t exactly stellar.

The most recent tidbit of information comes to us via Barron’s which relays that some Taiwan-based companies who supply any number of components for the iPhone have seen their revenue take a hit due to weaker than anticipated iPhone sales. According to the report, as many as 19 separate companies are “struggling to boost earnings” in the face of lukewarm iPhone sales, including Foxconn and Largan Precision.

Cumulatively, this group of 19 or so Apple partners have seen their revenue slip by about .4% year over year. Taken as a lone data point, however, we probably shouldn’t read too much into this figure. Still, it’s worth noting, especially in light of other reports that iPhone 7 sales have been a bit tepid lately.

For instance, reputed analyst Ming-Chi Kuo just a few weeks ago published a research note indicating that overall iPhone sales might be disappointing due to lower demand in China and no planned refresh of the iPhone SE.

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