If your iPhone unexpectedly shut down, while the phone still had battery power in it, you are not alone. A lot of people were reporting this battery issue. Now Apple has quietly fixed this issue in the recently released iOS 10.2.1 update. They had not acknowledged this issue before releasing the update, but they released a statement after releasing the iOS update, which was first reported by TechCrunch.
“With iOS 10.2.1, Apple made improvements to reduce occurrences of unexpected shutdowns that a small number of users were experiencing with their iPhone. iOS 10.2.1 already has over 50% of active iOS devices upgraded and the diagnostic data we’ve received from upgraders shows that for this small percentage of users experiencing the issue, we’re seeing a more than 80% reduction in iPhone 6s and over 70% reduction on iPhone 6 of devices unexpectedly shutting down.
We also added the ability for the phone to restart without needing to connect to power, if a user still encounters an unexpected shutdown. It is important to note that these unexpected shutdowns are not a safety issue, but we understand it can be an inconvenience and wanted to fix the issue as quickly as possible. If a customer has any issues with their device, they can contact AppleCare.”
If you are experiencing sudden iPhone shutdowns, then you should immediately install the iOS 10.2.1 update. You can install the update by going to Settings > General > Software Update.