Hi Tjapukai,
Thank you for using Apple Support Communities.
From your post I understand that you're having an issue with charging your iPhone 6, where it will give you an error that “This cable or accessory is not certified and may not work reliably with this iPhone.” First, make sure you are using the USB power adapter and cable that came with the phone, and have it plugged in to a functioning power outlet. Then please follow the steps below.
When you plug in your device, you might see one of these alerts:
- “This cable or accessory is not certified and may not work reliably with this iPhone.”
- “This accessory is not supported by this device.”
If you see one of these alerts, unplug your device try and these steps:
- Look at the connector at the bottom of your device and make sure it’s free of debris, then reconnect the USB cable.
- If you still see an alert, try a different USB cable or charger.
If your device still doesn't charge or you still see an alert after trying the steps above, contact Apple Support.
If you can’t charge your iPhone, iPad, or iPod touch
Take care,
Alex H.