Apple releases finished iOS 10.2.1 update bringing minor fixes
Wrapping up weeks of beta testing, Apple on Monday released the completed version of iOS 10.2.1, a minor update for the iPhone, iPad, and iPod touch.

The code fixes various bugs and security vulnerabilities in iOS 10.2, according to Apple's release notes. It can be downloaded over-the-air via the Software Update function in the iOS Settings app -- located under the General menu -- or else by connecting a device to iTunes on a desktop or laptop.
Apple released four betas of iOS 10.2.1, seeding versions to developers and the public. In that time, no new features or major fixes were discovered.
Apple is rumored to be preparing its first beta of iOS 10.3 for release later this month. That may include an alleged "Theater" mode, making iPhones less obnoxious if a person has to bring one out during a movie or stage show. It could in theory mute sounds, lower screen brightness, and block incoming communications.

The code fixes various bugs and security vulnerabilities in iOS 10.2, according to Apple's release notes. It can be downloaded over-the-air via the Software Update function in the iOS Settings app -- located under the General menu -- or else by connecting a device to iTunes on a desktop or laptop.
Apple released four betas of iOS 10.2.1, seeding versions to developers and the public. In that time, no new features or major fixes were discovered.
Apple is rumored to be preparing its first beta of iOS 10.3 for release later this month. That may include an alleged "Theater" mode, making iPhones less obnoxious if a person has to bring one out during a movie or stage show. It could in theory mute sounds, lower screen brightness, and block incoming communications.
Comments
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They're not the same device, as noted in the original post and purchased months apart from one another. Hers is backed up and updated to her Macbook, mine to my iMac. Same issue on both.
https://support.apple.com/en-us/HT207482
As for the 30% issue, I've not seen or met anyone who has had it, and nearly every single person I know or work with has an iPhone of some vintage. My wife is on a 6+ that is just over two years old now, she's not had an issue with it. Repeatedly dropped it, never shattered the screen, and only has it in a white Apple silicone case.
- Responsive on opening - it takes at least 30 seconds to load on my iPhone 6S and iPad mini
- Works offline - so I can actually watch the movies/shows downloaded/sync'd to the device
- Responsive when using - it can take up to a minute to load the movie / TV show page when tapping on the cover art
I have tried clean restores with and without backup to resolve the above 3 issues, but to no avail, so I really hope they have at least made some improvements! The Video app was so much better by comparison - the TV app seems half baked.This update didn't fix the AirPod Bluetooth disconnect issue during phone calls.
First call disconnected within 2 minutes.
SMH!
Doesn't mean there are not tens of thousand with the issue though, which would make it a significant issue.
From my own experience on the 6s, doing full cycle 0-100-0-100 of the battery helps people that only have a software issue (seems the OS loses track of the battery level).
Those that have hardware problems obviously won't be helped.
Here’s a comment I posted to Apple’s 19-page discussion.apple.com, on the battery issue:
Updated to iOS 10.2.1 yesterday. Still the same battery issues! Nothing fixed! While on separate wireline phone with Apple tech support, battery icon on iPhone 6 went from 100% to 4% in a matter of ten minutes. Then plugged the charging cable into the iPhone 6. Battery icon jumped back up to 91% within 30 seconds. Tech support ran diagnostics on my iPhone. Battery shows in the green (good condition). Tech support could not fix issue. Have to go into Apple store. Apple, please fix the SOFTWARE!
Note this is on an iPhone 6, NOT 6s.