iPhone 6 very slow with IOS 11 update

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

Posted on Oct 1, 2017 5:02 PM

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733 replies

Jan 18, 2018 2:42 AM in response to svaardt

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....😠


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!

User uploaded file

Jan 14, 2018 8:01 AM in response to svaardt

I too was seeing in the battery usage info that my 'No Mobile Coverage' was the highest battery drain at 53% over a few days. I have no mobile coverage at home, so use the WiFi calling option, However, as the phone boosts power to try and get a cellular signal (which it won't if you are in a no coverage area of course) - it can cause a battery drain quite rapidly.


In these situations, at home, you have to put it into Airplane mode, which turns off the cellular and then re-enable WiFi so stop this happening. Don't for get to switch off airplane mode when you go out again!

Jan 18, 2018 7:47 AM in response to El Paso Steve

Good news. Tim Cook says that a future version of iOS will let users control this feature and turn it off if they don't want it.

We will tell someone we're reducing your performance by some amount in order to not have an unexpected restart. And if you don't want it, you can turn it off.

It seems that they will roll this out in a developer beta next month, so it will take some time to get to users. But it's very good news, and what they should have done from the start.


The full story is here: https://www.macrumors.com/2018/01/17/tim-cook-on-iphone-battery-controversy/

Jan 15, 2018 7:25 AM in response to Marc007@

Marc007@ wrote: However, as the phone boosts power to try and get a cellular signal (which it won't if you are in a no coverage area of course) - it can cause a battery drain quite rapidly.


That's not correct. If you are in a no coverage area the phone will still try to connect periodically (it has no way of knowing it's a no coverage area until it checks), and it will do so using its maximum output (600 mw). It will thus put a significant load on the battery. If you are in an area that you know has no coverage but you have Wi-Fi put the phone into Airplane mode, then turn on Wi-Fi.

Jan 18, 2018 8:06 AM in response to Lawrence Finch

A big part of the problem is the training Apple gives their tech support people.


I contacted Apple tech support about six weeks ago to discuss the slowdown on my iPhone 6. At that point, the connection to the battery was being discussed widely on websites and in newspapers. But the tech support reps I spoke to had no clue about it. They wanted me to do a factory reset on my iPhone and then reinstall all my apps one at a time. That's right, they said I shouldn't restore from a backup because that could perpetuate the slowdown.


The "solution" they offered would have been a lot of work for me and it wouldn't have solved the problem. Meanwhile, anyone paying attention to Apple news knew what the problem was.


Why doesn't Apple train their AppleCare representatives on the technical causes of these common problems? Let's hope they do much better when this next update comes out. It's not rocket science.

Jan 14, 2018 8:57 AM in response to evergreens197

evergreens197 wrote:


Not only is mine slower but now needs to be placed on a hot radiator for 10 minutes to get it to switch on in the morning. This is absurd.

Either you're living in an unheated location in a cold environment or there's something seriously wrong with your phone. Putting it under a heater will only make things worse. Make an appointment at the Genius Bar at your local Apple Store and have them evaluate it.

Jan 18, 2018 8:27 AM in response to Andrew Shalit

You raise good points. This is by way of explanation, not a justification.

  • The technical support reps are not permitted to say anything that has not been approved by Apple Legal and included in their support scripts. [Apple is not alone in this; all large companies do it]
  • Six weeks ago this was not an acknowledged issue by Apple, so it would not have been included in support scripts
  • Tier 2 support techs are given more flexibility than the initial Tier 1 reps that answer the phone, so if you can escalate to Tier 2 sometimes you can get "unofficial" information. I did on a different problem a couple of months ago
  • Apple has thousands of support reps. Some are more highly skilled than others. And with that large a number, when a rep says they haven't heard of the problem before they might be telling the truth
  • If a rep doesn't have specific instructions on a topic they will revert to "standard" troubleshooting steps, which is what you were told.

Jan 8, 2018 8:04 PM in response to adrian267

Me to. Just install 11.2.1. I was forced to update from a perfectly good working fast iPhone 6 on IOS 10x to protect myself from this new “meltdown” cpu issue. What a freakin disaster. EVEYTHING is like molasses. Takes forever to do anything. Did the update via hardware thru iTunes in MBP and still slowed phone to almost useless. No wifi courption possible so must be Apple slowing this phone 6 on purpose.


Apple your gonna pay for this !

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iPhone 6 very slow with IOS 11 update

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