Method: 1. If the message \"Sub-cable or accessory has not been certified and therefore may not work reliably with this iPhone\" is displayed on the iPhone 6s. This means that the lightning connector of your Apple iPhone 6s data cable or accessory has not been certified by Apple MFI, which will cause the data cable or accessory can not play its function well. In this case, it is recommended to replace the Apple data cable products that have been certified by MFI, such as the Green Link iPhone6 s data cable. Passed Apple MFI certification, compatible with all systems, flexible and not easy to break 2. Other reasons analysis and solutions Reason 1: iPhone 6s just access the Apple data line does not support this accessory prompt, this problem is generally poor contact, solution: See whether the data line gold finger has dirt, and then check the phone tail plug (data option jack) whether there is dirt, clean with cotton swab alcohol. 3. Cause 2: The iPhone 6s does not support this accessory when it is charged by USB on the computer. It is generally caused by insufficient power supply. 4. Cause 3: The use of inferior charger charging, insufficient voltage, resulting in normal charging, iPhone 6s will also appear does not support this accessory prompt. Solution: Replace the USB charger, it is recommended to use the charger with intelligent charging function.
