If you’re using an Android Wear smartwatch with an iPhone (and we know that there are quite a few who are), you may want to hold off on upgrading to the iPhone 7.
Some people are experiencing issues with the iPhone 7′s Bluetooth connectivity, including not being able to pair their phone with the second gen Moto 360, Moto 360 Sport, ASUS ZenWatch 2, Fossil Q Founder, and TAG Heuer Connected. This may also apply to the first gen Moto 360 and the LG G Watch.
Unfortunately, this may not be Google’s fault. It seems that people are having trouble with the iPhone 7′s Bluetooth connectivity in general, including flaky or dead connections to cars and other devices. (It was a bad time to remove the headphone jack, huh?) It might be on Apple to fix this, but Google is looking into it.