Disclainer and apology first : i am an iPhone newbie and an elderly one at that , so please keep put-downs to a minimum 'coz ,with luck , you will be old one day too. Lately , when i go to re-charge my recently purchased iPhone 6s , the phone lights up with "This cable or accessory is not certified and may not work reliably with this iPhone." The message is half right - it doesn't work well and charges only very slowly . But it's half wrong too . The charger is the same one that came in the box the phone came in. I'd go to an Apple store , but i live in a small rural town with the nearest Apple store four hours' drive away. Thanks for any help provided.