iPhone 6 very slow with IOS 11 update

I don’t know how many times it’s been said here, but Apple have stopped signing IOS 10. You cannot restore it to 10, end of - period, as they say in the US of A.

It’s a matter of dealing with it until IOS 11.99 is released if need be - hopefully before we all lose the will to live.

yes i am on ios 11.2 i do have ios 10 backup but,,seriously apple was one my dream phones and m disappointed by performance..i was aware tht iphone 6 has 1 gb of ram still i trusted apple tht optimization level would be good than android but i am really disapponited how crap is ios 11 is....

That is the problem, you can't restore the backup because you're just transferring the problem over. You need to restore it as a new phone and then sync everything manually with iTunes. You'll need to put your apps back on one by one and you'll lose that data. Some apps can be backed up individually to solve this problem, like whatsapp for instance. This is what I was told by Apple Genius Bar and I think they are correct, I just haven't had time to do this myself yet.

Illiniry wrote:

That is the problem, you can't restore the backup because you're just transferring the problem over. You need to restore it as a new phone and then sync everything manually with iTunes. You'll need to put your apps back on one by one and you'll lose that data. Some apps can be backed up individually to solve this problem, like whatsapp for instance. This is what I was told by Apple Genius Bar and I think they are correct, I just haven't had time to do this myself yet.

I'd be interested in hearing if anyone else has done this and gotten positive results.

Even if it works, it's quite a price to pay: losing all of my in-app data, all the progress and levels I've attained in games, having to individually restore and arrange dozens of apps that I have on my phone. That's on the order of a full day of work, and even so I wouldn't get everything back.

I still hope that Apple is aware of this problem and will release a fix for it.

Lots of those services store the data on their side. Losing the app is basically the same as if you logged out of the app on your phone and logged back in. I do not think Apple will fix this. It was a bad install and needs to be wiped to fix it.

I also have an answer: ditch Apple and go with Android; take a look at how much searches for "iPhone slow" spike every time there's a new release with Apple and then compare that with Android's releases... you don't see this massive spike in their users searching for solutions to why their phones are suddenly slow or a mess. I'm so done with Apple. The features are always a year or two behind the other guys and they have the arrogance to pretend they invented everything. They're a slow-follower who acts like they're the innovator-leader in their market. And you pay more for the privilege.

And then there's the subsidiary issue that iTunes 12.7 no longer seems to be a repository for your apps. So, that option seems to really be, write all your apps down, find them in the App store, then download them one by one.

I have some more data, and a possible workaround until Apple fixes this problem.

Using the utility CPU DasherX, I can watch the clock rate of the CPU in my iPhone 6 change when the battery charge level changes.

When the battery is at 93%, the CPU runs at 1127 MHz, which is pretty close to 1.4 GHz it's rated for.

When the battery drops down to 90% the CPU drops to 839 MHz.

When the battery drops down to 89% the CPU drops to 600 MHz.

When I charge the phone, the CPU speed tracks upward at the same points. Back up to 90% battery, the CPU goes back to 839 MHz. Back up to 93% battery, the CPU goes back to 1127 MHz.

I could pay $80 and replace the battery on my phone. People have reported that fixes the problem. But I don't really want to spend $80, and it's not clear how long the fix will last. Maybe when the new battery starts to age, the problem will come back. I'm also still hopeful that Apple will acknowledge and fix the underlying bug.

My workaround in the meantime is to use an external battery back all the time. If I can keep the built-in battery fully charged, then the phone will keep running at full speed. And when Apple fixes the problem, I'll still have a useful external battery pack. Sure, I'm stuck carrying it around, but they make some pretty slim ones these days, so it might not be that bad.

Well that’s the twist, it won’t be fixed !

That power / performance policy was specifically introduced by Apple starting from iOS 10.2.1 to avoid sudden power shutdown that was affecting all iPhone 6 and 6s. Twisting a software is less expensive than to change millions of batteries under warranty or the risk of a class actions.

Reverting this power management algorithm would just reenable the sudden power failure.

As for the battery mine, is 11 months old (changed but Apple) and the iPhone slow since 2 months. So you have your answer...

Vincent D wrote:

That power / performance policy was specifically introduced by Apple starting from iOS 10.2.1 to avoid sudden power shutdown that was affecting all iPhone 6 and 6s.

I experienced sudden shutdowns twice in the year leading up to the release of iOS 11. I would much rather have that happen 2x per year than have a phone which performs poorly every day. If enough users complain, perhaps Apple will revisit this decision.

Thanks for sharing this, Andrew. Fascinating and very interesting.

I also just installed CPU DasherX on my iPhone and can observe the same behaviour. My iPhone was down to 25% CPU and was running at 600MHz. I started charging it. I see the CPU running up to 839MHz as soon as the battery load reached 50%. It actually fluctuates between 830MHz and 839MHz.

Once battery load goes above 85%, CPU clocks to 1127MHz.

Changing cpu speed based on battery charge is rediculous. CPU speed should be adjusted by load. If the user is actively trying to do something speed it up... if the device is not being used, slow it down. Nothing like trying to send an emergency text on the last few red bars and the phone is slow sluggish that you burn up the rest of your battery just trying to get the screen to refresh. I've had it... this is my last iphone. Seriously. I cant keep upgrading my phone every year simply because I cant go backwards in firmware revisions.

flgliderpilot wrote:

should add i didnt even choose to update, ios tricked me into it somehow and it was done while i was sleeping. now my phone is practically useless.

You have to explicitly accept the update for it to be installed. I'm sure it's quite possible you simply didn't read the box that you clicked "Ok" to but that's not anyone (except possibly yourself) tricking you.

Killerfrog98 wrote:

It's OK, Apple will soon delete his comment; they tend to censor anything negative

No, they remove posts that violate the Terms of Use. It is quite possible to say negative things and not have a post deleted. Mostly, it requires that you be polite and not speculate. If Apple delete all posts that were negative, this thread wouldn't exist. Certainly the thread complaining about the change in the way the Control Center functions wouldn't be allow to continue.

If you say, "I hate X about my iPhone. I think it's awful, possibly the worst thing Apple has ever done. How can I change it or workaround it?", your post will not get deleted. You may get called out on the hyperbole, of course. However, if you say, "Apple s*&&s {rude}, they did this on purpose to make me buy a new phone {speculation} and I'm going to start a class action law suit {just a bad idea},", yes, your post stands a very good chance of being removed.

IdrisSeabright wrote:

flgliderpilot wrote:

should add i didnt even choose to update, ios tricked me into it somehow and it was done while i was sleeping. now my phone is practically useless.

You have to explicitly accept the update for it to be installed. I'm sure it's quite possible you simply didn't read the box that you clicked "Ok" to but that's not anyone (except possibly yourself) tricking you.

Don't blame the user for this. When a new version of iOS comes out, users get prompted repeatedly to upgrade. These prompts interrupt what you're doing, and you have to tap buttons to dismiss the dialog before you can get back to using your phone. The buttons are not clearly labeled. One of them says "Install Later". Most people who tap that button probably think it means "ask me about this later." But that's not what it means. If you tap "Install Later", the update will install overnight, and you'll wake up with a phone that has the new version of iOS.

There is no way to tell iOS, "I don't want to update. Please stop bugging me about it."