Just updated to iOS 10.1 and discovered that your device is saying that “This cable or accessory is not certified and may not work reliably with this iPhone”? Try this fix.
This problem is caused by iOS 10.1 trying to prevent people from using non-certified or fake lightning cable which has a cracked authenticator chip.
Apple updated the codes in iOS 10.1 and will prevent “fake” lightning cable from charging your iPhone.
Although this seems to work in earlier versions of iOS, Apple, as usual would do anything they can do block any non-approved third party devices.
While this irritates many people, Apple is actually doing them a big favor by providing a guarantee of their safety. There have been many cases of iPhone 7’s which blew up due to the use of fake lightning cables.
Thankfully, there’s a temporary fix for “This cable or accessory is not certified and may not work reliably with this iPhone” error while you find the time and money to get a genuine or approved ligthning cable from Apple.
These simple 8-steps process may help:
1. Turn on USB power
2. Plug in lightning cable to iPhone
7. Dismiss warning again
8. It should now charge
It’s a bit of hassle doing the steps above all the time, so I would suggest that you get yourself a genuine lightning cable from your nearest Apple store.
Alternatively, you can continue waiting until a hacked version of the cable becomes available for the iPhone 7.