After receiving IOS 11.01.1 on my MGCT2LL/A1522 (iPhone 6), my phone is super slow. Apps hang, then close (like the Starbucks app), my purchased music would just stop in the middle of a song, then I had to close the app and re-open.
In general, everything is very slow to respond, and I have rebooted twice.
Any suggestions
HERE'S THE FIX: Go into Settings> General> Reset> Reset All Settings (this will reset iOS settings, won't touch your apps)
WHAT THIS DOES: This will *not* erase your phone, but will reset most of the things you can adjust in settings on iOS (you'll need to re-enter you wifi, adjust notifications and privacy settings again, reset your default account for Calendar and Notes, etc, but all your email accounts and iCloud account will still be logged in and all working).
FIXES THIS ISSUE: I had the same issue: iPhone 6S. Upgraded. Even with 25GB free, I'd press a button and often have to wait 1-3 seconds for a response, or copy and paste selectors would be really slow to appear, even the keyboard was unresponsive... phone was barely unusable, literally. I think most people don't get it because most who updated to iOS 11 noticed it being a little slower but not 90% slower. Those like us need to take this step.
BACKGROUND: When I was scouring I found that erasing your phone and restoring from backup worked for people on Reddit, and that should be reliable. I was in the process of doing that myself and accidentally chose "reset all settings" instead of "erase all content and settings". My phone rebooted and all my apps are fine, just needed to go through iOS settings and readjust things.
ALTERNATIVES: This is obviously better than either (a) downgrading to iOS 10 or (b) making sure your phone (as it is now on iOS11) is backed up to iCloud, erasing it, and restoring from that backup.
The difference in speed is shocking.
Pretty sure this will work for you too.
I went in to the Apple store today and a rep told me that the only way to fix this issue is to manually backup everything on your computer and then erase all content and settings. You would then need to choose the option to restore it as a new phone and then sync everything back again with iTunes / Photos, etc as opposed to restoring a backup file. If you do a full backup of iOS 11 and restore it from that, it will just transfer the problem again so that is not a viable solution. Hope this helps, I plan to try it soon.
Hello everyone,
Welcome to Apple Support Communities, for everyone who has slower than expected performance on their iPhone or iPad, in the post we have found many methods that work.
1) Update to the latest version of iOS 11, which is iOS 11.1.1, this update brings big fixes and improvements to your iPhone and iPad:Update the iOS on your iPhone, iPad, or iPod touch - Apple Support
3) Restart your iPhone or iPad by: https://support.apple.com/en-nz/HT201559
4) Reset iPhone Settings, go to Settings > General > Reset > Reset All Settings, this will not erase any documents or data, but backup your device beforehand.
If nothing else works, restore your device to iOS 11.1.1 using iTunes, you can learn how to Restore your device to factory settings using the provided articles below, then after you have restored your device, you can restore from an iCloud or iTunes local backup after. Be sure to make an encrypted backup so Health & Activity, iCloud Keychain and password settings get kept after restore.
Restore your iPhone, iPad, or iPod to factory settings - Apple Support
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
Thanks for using Support Communities
RANT:
If the steps provided here, don't work don't complain to us about planned obsolescence, or Apple slowing down iPhone's, because I have had a positive experience all throughout iOS 11, and it's not the latest device, also don't recount your personal experiences then blame Apple for your misfortune. Do the smart thing and take your phone into an Authorized Apple Re-seller and get it fixed. Stop complaning!
<Edited by Host>
Thanks for this update. I have many apps on my phone, so this may very well be a common factor.
I will try this suggestion. Having said that, the only thing that has helped me so far is reverting from 11.1.1 back to 11.0.1. Huge difference when combined with reset all settings.
You are a life-saver (Serolio). After months of thinking my iPhone was now a sluggish brick, this worked magically.
Everyone else having this problem, do try going to Settings > General > Reset > Reset All Settings before you despair and abandon your iPhone altogether, which I was on the verge of doing too.
Reset works. Do it twice though as aparantly users are finding this to be even more successful.
HOWEVER: You have to ask what setting is causing the problem. After I did a reset everything was great again. Super springy and responsive. UNTIL Facebook. After launching Facebook and allowing notifications and location services the phone went straight back to its sluggish, unresponsive app crashing self again.
I'd definitely recommend a double reset. BUT, try uninstalling Facebook (and Messanger) and redownloading after a restart first as it may just save you having to input all your wifi, credit cards and other settings again.
Let me know how you get on.
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.
The problem isn't caused by fancy features of iOS 11. It appears to be the side-effect of a bug fix.
In the iPhone 6 (and possibly 6s), the CPU would sometimes spontaneously shut down when batteries began to age. You'd be using your iPhone, and it would suddenly shut down (or restart) without explanation. The batteries weren't supplying sufficient voltage to keep the CPU chugging along.
As of iOS 11, iOS detects the battery issue and in response it under clocks the CPU. On my iPhone 6, when the battery reaches 90% charge level, the CPU goes from 1125 MHz down to 800 MHz. When the battery charge level goes down to around 85% the CPU starts operating at 600 MHz. Note that the CPU is rated to run at 1400 MHz.
Not surprisingly, the lower clock rate has a bad affect on performance! Personally, I'd rather have my phone shut down once a month if in return it worked fine the rest of the time. Instead I have a phone that performs poorly almost all of the time.
Hopefully Apple will come up with some other way to address the problem.
There are a few things you can do when dealing with a slower iPhone
1. Restore your settings as someone in this thread mentioned.
2. Make sure that you have some space left, devices tend to be slower when they are full.
3. There are some settings can turn off animations, transparency...etc. Changing these may significantly boost speed.
One last thing, not about users, but about Apple. Apple's decision put 1GB of RAM in iPhone 6/iPhone 6 Plus is a huge mistake. 1GB is the same as iPhone 5 and iPhone 5s, but iPhone 6/iPhone 6 Plus has much higher screen resolution. The ultimate solution then is to switch to a newer device.
I got a battery case for my iPhone 6. So far so good. My iPhone's internal battery is now pretty much always at 100%, which keeps the performance problems at bay. The cost was about $15. It's a little bigger than the previous case I had, but it's worth the tradeoff.
Chee-Wui Chu wrote:
CPU Dasher confirms that CPU running at 1127 MHz after factory reset vs. 600 MHz before reset.
I think that there was more happening than just slower CPU. Non-responsive home button cannot be due to slower CPU.
Could you let us know if your phone continues to run at 1127 MHz even when the battery starts to drain.
That is what makes a difference on my iPhone 6. If the battery is fully charged the CPU runs at 1127 MHz. Once the battery drains below a certain level (90% in my case) the CPU slows to 830 MHz and then 600 MHz.
Uboat - I share your frustrations. Went through many hours with Apple help online. When I discovered my phone was covered for a free battery replacement (found that out through reddit) I bit the bullet and went to the Store for an appointment. The in store diagnostics are done on wifi right there in front of you - not sure why your phone needs to be on premises to get a wifi diagnostic. Anyway my battery was almost done. After they replaced my battery my phone would not power up so they gave me a new phone.
High 'level' posters here with high 'points' insisted there was no way updates were slowing phones - they were wrong. Sort of exposes this forum as of limited value for technical advise. The store and reddit were the most helpful things for me. My experience at the retail store was sooo much better than online and nothing like the interactions on these forums.
That is what I was referring to in my post - for those (like where I live, where there is no cellular signal that use WiFi calling), but with additional battery drain - as a result of the phone increasing power output trying to reach a signal it will never get.
I only mentioned it here as the battery seems to have become the primary factor in why the phones are being slowed as a result of Apple's decision to arbitrarily do this for weakened batteries. So for those who have wifi calling as an option, it may help their battery by turning on airplane mode first, then reactivating wifi, for the purposes of reducing battery use relating to cellular use. Until everyone affected all go and get new batteries of course....ðŸ˜
Here is a picture of my battery usage without Airplane Mode being on so you can clearly see what's at the top of the tree!
How old is your iPhone 6 or other iPhone 6 model?
It maybe time for a new battery under Apple’s reduced priced iPhone battery replacement program.
A new iPhone 6/6S/6S Plus battery will return your iPhone back to its normal performance and operation.
Andrew Shalit wrote:
So, this is not perception or imagination. iPhones with old batteries that were being throttled under previous versions of iOS 11 get an immediate performance improvement when iOS 11.3 is installed, even without a battery replacement. Of course, if you experience unexpected shutdowns or other battery problems, throttling will be turned on. At that point you can live with it, you can turn it off and take your chances with shutdowns, or you can replace the battery.
I believe that's exactly what I said to poster to whom I was replying.
iPhone 6 very slow with IOS 11 update
