Charge not compatible; original accessories
Hello!
I've already posted this question in Portuguese, but no one replied it yet, so I'm posting in English.
I have an old iPhone 3GS that still works fine (the battery is a little old and the mute selector is not working well lately, but except that, it's fine). In the last week, it started to display the message "Charging is not supported with this accessory" when I try to charge with the charge adapter. Either the charge adapter and the USB cord are originals. The USB cord is a little newer than the charge adapter; I had to change it once. If I plug the iPhone in my PC using this same USB cord, the iPhone is charged correctly; when I use the adapter to charge another iPhone (using other USB cable), it works correctly.
I have already tried to clean up the connector below the iPhone; made a backup and restored the device from the backup; but nothing of these solved the problem.
I've run out of ideas.
Thank you all!
iPhone 3GS, iOS 6.1.6, null