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iPhone 6S Plus here. Phone runs great on 11.2.1. What you're experiencing is definitely not normal and I'm way past 500 cycles. I'm curious to see what would happen if you wiped your phone completely and set up as new.

I wouldn't waste the time with that since he is running a 6s. The "evidence" of the past couple weeks is pointing to the battery. Maybe the 6s plus battery isn't affected since it is larger. One way to tell is use CPUDasherX and see what speed it shows the CPU running at.
 
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I’ve not had it that bad but it’s still extremely noticeable and totally unacceptable


It’s bugging me. It’s not like iOS 11 really changed anything considerably. Yet the performance hit is so bad.

Just spoke to Apple support who ran diagnostics and said everything is fine. Hopefully if enough people raise this issue then Apple will have to respond.

It obvious changed more than we thought under the hood.
 
We have three 6S’s in our household. All 2 years old now, all three suffering from major slowdowns.

I think I’ll be writing to Apple and using this as supportive evidence. This isn’t acceptable on such an expensive device.
Were yours eligible for the battery replacement program? Apple does have a battery replacement program for the 6S. I got mine replaced for free.
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Sadly this just confirms my assumptions. My 6s has been getting worse and worse every day. (well, it's still very usable but you know what I mean) Battery health changes between 80% and 87% and the OS itself is slow and buggy. But the biggest impact is, once again, on the battery.
Check if yours is eligible for the battery replacement program for the 6S, which Apple launched years ago.
I got my 6S battery replaced for free earlier this year under that program.
 
I don't have a problem with power management routines reducing CPU speed to compensate for low battery capacity - what I have a problem with is Apple HIDING WHAT THEY DID, and not allowing the user to have a choice. That's pretty shameful.

Apple, put a setting in the dang battery settings that allows a user to choose "longer battery life -vs- better performance". A 3 or 4 position slider would be perfectly adequate.
Come on. This is the same company who changed the meaning of "off", without giving the user the ability to change it.
 
For those with a 6S, instead of just complaining, why don't you just check to see if you can get a free battery replacement?
https://www.apple.com/support/iphone6s-unexpectedshutdown/

Seriously, Apple launched this program in 2016! And nobody took advantage of this?



Phones, that aren't included in the free battery replacement program, are also susceptible to this issue. My 6s wasn't eligible for the program, yet before replacement my 6s was running at 911 mhz.
 
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Come on. This is the same company who changed the meaning of "off", without giving the user the ability to change it.
Off is still off. Control center is now temporarily disconnect.

Sometimes things change, which is very difficult sometimes. Or it’s easy. Depends on the person.
 
iPhone 6 here... 30 seconds to more than a minute for letters to show up after typing. Sometimes I press on a link and nothing happens for longer than I can hold my breath. Then when I go to press on it again, the page opens and I've inadvertently pressed another link and I have to wait again...omg I want to throw it thru an Apple store window. The battery was replaced a year ago (my cost) but my phone is all but bricked and rebooting/resetting/restoring doesn't help.

~Thank you iOS 11... As soon as I installed it, this scat has been happening.
Can you please post a video or a screen recording to show us just how slow your iPhone 6 has become?
Btw, I never said you were lying or anything like that, my sister's 6s is already affected: 919/1268 score on geekbench, slower than a 5s!
 
I have a 6s, purchased in December 2015. A few days after the purchase, I ran Geekbench 3 and got 2539 single-core and 4430 multi-core. Since then I didn’t run Geekbench until a few minutes ago. With Geekbench 4 I just got 2553 single-core and 4447 multi-core. Both are slightly higher than my results two years ago. The only thing I’ve noticed is the screen sometimes (not always) appears to be a little dimmer, usually when the battery is under 50%, but sometimes higher. I guess my battery is still in decent shape and performance isn’t being reduced...yet. I’m a little worried about iOS 12.
 
Off is still off. Control center is now temporarily disconnect.

Sometimes things change, which is very difficult sometimes. Or it’s easy. Depends on the person.
Control center off is no longer off. It used to be off. So yes, Apple is changing the definition of off.

But more importantly, and why I quoted the post I did, was that Apple refuses to allow the customer to choose how control center works. Much like Apple was not going to allow the customer to toggle the CPU throttling, like that poster asked.
 
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This proves planned obsolescence exists. Some iPhone 7 models have been slowed down on iOS 11.

This does not prove anything. And if it did prove that Apple is slowing down phones, its for the benefit of the user, slightly slower phone, and your phone won't just crash...until you get a new battery. Planned obsolescence would be that changing the battery did nothing.
 
This does not prove anything. And if it did prove that Apple is slowing down phones, its for the benefit of the user, slightly slower phone, and your phone won't just crash...until you get a new battery. Planned obsolescence would be that changing the battery did nothing.
Over 50 percent slower is your definition of 'slightly'. I guess all these years I had the incorrect definition for slightly.
 
I don't have a problem with power management routines reducing CPU speed to compensate for low battery capacity - what I have a problem with is Apple HIDING WHAT THEY DID, and not allowing the user to have a choice. That's pretty shameful.

Apple, put a setting in the dang battery settings that allows a user to choose "longer battery life -vs- better performance". A 3 or 4 position slider would be perfectly adequate.

As I understand it the reason performance was throttled was to increase stability, not battery life. The problem is that voltage is less stable in degraded batteries, so Apple altered performance so that the SoC runs stable even with unstable voltage.

Agreed that they should have said something. Most of us didn't know that a new battery would return our iPhone's to their original performance.

I certainly try a new battery on my 6+. Easy to swap in a new one and cheap enough not to matter much if it doesn't work.
 
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Control center off is no longer off. It used to be off. So yes, Apple is changing the definition of off.
Yup. Like I said, sometimes things change. It can be very difficult for some.

But more importantly, and why I quoted the post I did, was that Apple refuses to allow the customer to choose how control center works. Much like Apple was not going to allow the customer to toggle the CPU throttling, like that poster asked.
Apple isn’t known for having hundreds of different options for modifying the default behavior of UI elements. Some things can be changed, others can’t. This has been the case for about a decade on iPhone. If you need more control, Android is a better option for you.

Much like Apple was not going to allow the customer to toggle the CPU throttling, like that poster asked.
Exactly. If you’re waiting for Apple to bring back the option where a phone with a degraded battery shuts off unexpectedly because it can no longer handle the load of the CPU at full speed, you’re going to have a really long wait. That’s not something Apple would probably do.

That said, I do think Apple should let users know their battery should be replaced so it can supply the power necessary for reliable full speed operation. Much like they added a pop up with explanatory text telling users how the CC toggle for Bluetooth and WiFi had changed behavior.
 
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Any paired comparisons? With the same phone before/after battery swap?

And what degree of performance do these arbitrary numbers refer to?

And why is it plotted as a probability density? Is it 50 or 50000 samples?

I did a simple test on new iPhone SE between 9.3.2 and 10.1.2 using Antutu app. Numbers were very close. Phone was only a few days old.
 
Yup. Like I said, sometimes things change. It can be very difficult for some.


Apple isn’t known for having hundreds of different options for modifying the default behavior of UI elements. Some things can be changed, others can’t. This has been the case for about a decade on iPhone. If you need more control, Android is a better option for you.


Exactly. If you’re waiting for Apple to bring back the option where a phone with a degraded battery shuts off unexpectedly because it can no longer handle the load of the CPU at full speed, you’re going to have a really long wait. That’s not something Apple would probably do.

That said, I do think Apple should let users know their battery should be replaced so it can supply the power necessary for reliable full speed operation. Much like they added a pop up with explanatory text telling users how the CC toggle for Bluetooth and WiFi had changed behavior.

People would then moan that Apple are using system popups to try and extract money from people.
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This does not prove anything. And if it did prove that Apple is slowing down phones, its for the benefit of the user, slightly slower phone, and your phone won't just crash...until you get a new battery. Planned obsolescence would be that changing the battery did nothing.

Yep as I said earlier, terrible battery life would be the biggest factor in persuading people to buy a new iPhone. Most normal people simply do not recognise stutter and lag.
 
...snip...Apple charges an out-of-warranty fee of $79 to replace the battery of all eligible iPhone models in the United States. iPhone 6s users can contact AppleCare or schedule a Genius Bar appointment at a local Apple Store using the Apple Support app.

Apple did not immediately respond to our request for comment about the Geekbench findings. We'll update this article if we hear back.

Article Link: Geekbench Results Visualize Possible Link Between iPhone Slowdowns and Degraded Batteries

You should also report that Apple has also been refusing to do an in-warranty replacement on many of these phones, even though they've been slowed down to accommodate a worn battery while covered under AppleCare.

They've set the bar too high, and give these phone batteries a passing grade even if they're down to 81% of capacity during the AC warranty period.
 
Did Apple email the people who owned the devices? They should know who they are from their iTunes account tie to the iPhone.
You visited Macrumors. If you are so ignorant to not even check Apple's website, you wouldn't be visiting this site nor complaining.
 
I am VERY surprised macrumors did an article on this! WOW! In all honesty I assumed this site was an Apple apologist run site. Props to MR!

I am one of the affected with an iPhone 6s 32GB that just turned a year old on the 26th of November. So battery degration "over a few years" is hogwash.
Macrumors is objective.
Some users are not objective (but most seem to be), so it's the forums that get wacky sometimes.
 
Yep as I said earlier, terrible battery life would be the biggest factor in persuading people to buy a new iPhone. Most normal people simply do not recognise stutter and lag.

Lol ok,

Maybe next time my car won’t turn over due to dead battery , I’ll just go buy a new car.
 
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So basically Apple just can't win!

Iphone users experience random shutdowns due to degraded batteries causing low voltage shutdowns... users complain.

Apple issue a fix to reduce load on CPU to prevent low-voltage shutdowns from happening on iPhones with degraded batteries... users still complain.

I would love to know what is,

Apple do [something-something-somethng]... everybody in the world rejoices!

They didn't tell anyone they were doing this for one thing. I can understand the need for power management to prevent sudden shutdowns. But when the battery degrades enough to slow down the CPU more than 5-10% then the user should be notified that he needs to have his battery checked by an Apple Store. And the Apple Store shouldn't force us to wait until the battery is below 80% capacity, all the while it's running at 2/3 to 1/2 speed by that point.

When people complained that their phones were slowing down while under AppleCare warranty, the Apple Genius very often told them their phone was passing their tests and to go home and restore as a new phone and lose all their call logs and iMessages, and they thought "I just need a newer phone" not "I just need a newer battery".

When my son restored iOS and set up as a new phone as directed, it didn't fix his iPhone 6 and Apple still wouldn't replace the battery at 82%. So he bought a new 7+ because he's too committed to the Apple Ecosystem. Then he found out that his most recent iTunes backup with all his call logs and messages was corrupted, and his restored iPhone 6 had automatically written over his iCloud backup with the new one overnight. That data was gone forever.
 
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