I was glad when Apple “slowed down” my old iPhone. It fixed the sudden shut down issue for me that was driving me insane. The shut downs were unpredictable and

I was glad when Apple “slowed down” my old iPhone. It fixed the sudden shut down issue for me that was driving me insane. The shut downs were unpredictable and rendered my phone unusable until it was plugged in to charge. It would have been better if Apple acknowledged the sudden shut down issue in the first place, rather than rolling out this secret fix. They denied all knowledge when I took my iPhone 6 in for service, and refused to replace the battery as it was still showing more than 80% of its original capacity.