So, I'm curious about something I was told in an Apple Store, and I wanted to get a second opinion. My fiancée has my old launch day iPhone 6 Plus, and the ringer switch has started acting up – it was a bit funky when I owned it, but has started being nigh unusable recently. In short, although the physical action of the switch works, switching it doesn't produce a response in iOS, and you need to pull the switch up a little to make it register that it is on silent. At other times, it is prone to flickering between silent and ring on its own, without the button being touched. The battery is also close to dead (of old age), and so we wanted that to be replaced at the same time. When we took the phone into the Apple Store, they tested it and diagnosed the "sensor behind the switch" as being faulty, which makes some degree of sense. What's weird is that I was told that it was impossible for the Apple Store to replace the ringer switch on its own, because it's "part of the unit," and that I would need to purchase a brand new iPhone 6 Plus for £300. So, I didn't quite believe this, and so I went and looked on iFixit. They have a guide to replacing the ringer switch and volume buttons cable, as well as one for the buttons themselves, which between them look like they'd solve the issue. I'm wondering, then: Why have Apple told me I need to replace the whole phone? Is their diagnosis accurate, and is there any way to get the ringer switch and battery repaired beyond just buying an entirely new device? Many thanks for reading.