Some users using accessories for their devices, have found problems with the NFC-chip work at the new iPhone and optical stabilization on the iPhone 6 Plus. As it turned out, the problem associated with the manufacture of accessory materials - metal or magnets may cause similar problems for iPhone 6 / iPhone 6 Plus.
Despite the fact that the problem is common among many users of its presence not everyone knows. Apple noted it in his small accompanying documentBut a wide range of people about problems is not known.
Also, Apple has tightened the requirements for the enhancement of the program «Made for iPhone» (MFi) and encouraged its members to abandon the use of metal and magnets in their accessories. This is indicated by sources familiar with the situation.
Magnetic interference causing problems for NFC-chips for Apple Pay, and optical image stabilization on the iPhone 6 Plus. On older devices, the use of metal or magnets in the accessories do not interfere with the built-in sensors.
Therefore, be careful and do not buy for their iPhone 6 and iPhone 6 Plus metallic or "magnetic" accessories.
(via)