Marvell, for example, supplied the Wi - Fi chip in the original iPhone and is a leading supplier of controller chips for solid - state drives. (cnet.com)
At the time, iFixit blamed what it called the «Touch Disease» problem on pair of touchscreen controller chips found on the logic board of the iPhone 6 and 6 Plus. (tomsguide.com)
The reason for the touch issue is the location of the touch controller chips on -LSB-...] (iphonemode.com)