what is DFU mode. when i frist got the phone i installed t from a backup that proped on the iphone 6 plus. from there it said there is a update so i did the update and all looked fine. today i went to 2 apple stores 2 verzion stores and a mom and pop store to see if there iphobe 6 plus does this as well. and they all did just like mine. so i dont know how yours does but the 6 phones i looked at and mine dont. makes no sense at all