Hi folks.
Been scavenging the whole internet for a month to resolve my volume button issue. Fortunately it's been solved. Let me give you some context.
Around a month ago, my upper volume button on my (at that time) three month-old iPhone 15 Pro Max started to not respond. I thought it was a software issue, so, naturally, I tried downloading the latest software updates, but to no avail.
So last weekend I went to the Apple Store where I purchased the device from, and after running some diagnostics, the employee told me there were two options - either completely resetting it, or having it repaired. I decided for the latter one, as only the front and back glasses and camera system would not be replaced - everything else (battery, hardware, etc.) would be brand new.
The whole operation took only 1,5 hours and was completely covered by warranty. The repair costs were upwards of EUR 700. The issue was due to a production fault.
Very satisfied with the service. So, if you're also experiencing the same volume button issue, go to the Apple Store and they'll fix it.