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Way to figure this out might be, if it happens to you, look under the battery settings and see if some app ate the battery, then you know which app isn't playing nice with iOS 9.
 
Probably restored from backup. Leave your old junk from that 3GS behind.
that was true when backups where made in iTunes, iCloud backups don't have that issue...

-------------


Anyways, my sisters 5S has had this trouble w iOS9, she plugs it back and it shows a lot of battery left. I thought at first it might just need a good calibration, but I guess iOS9 could also be the culprit since it was working ok in iOS8
 
bet this is a bug in their automatic low power mode code... once you try to get too clever messing with the lowest level power states of embedded processors you open the potential of getting into these sort of half bricked states where A requires B but C is powered down which needs A sort of situations. deep power savings is a very tricky feature to get right.
 
bet this is a bug in their automatic low power mode code... once you try to get too clever messing with the lowest level power states of embedded processors you open the potential of getting into these sort of half bricked states where A requires B but C is powered down which needs A sort of situations. deep power savings is a very tricky feature to get right.
An educated guess, but since multiple generations of iPhone seem to be involved, I'm not sure it's correct
 
Well they surely are, but consider they are supporting 3-4 years old hardware when elsewhere users are lucky if they will receive 1 update (Android world anyone?).

What's that other companies name again? Oh yea! Microsoft - now how long did they support XP for.
 
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Well you've probably guessed it, but it's so you can say, ''oh damn, this iPhone is getting slow, I better get the latest one tomorrow.'' I still believe this is what they do with software, they put something inside to slow down older devices.

But seriously, is it really that bad with the 5s? I also got one and I'm still on 8.4 due to the fear of it becoming slow.

And how can you downgrade OSX? It's funny, but next to the phone, I also got the same laptop, a 2011 MacBook Air (1,7ghz i5, 4gb ram), and for the same reasons, I still haven't upgraded to El Capitan. If you have, how is your performance? And are you sure you can go back to lets say, Yosemite if you're not happy?

There are several ways to restore a Mac to the OS it shipped with. For the 2011 MacBook Air, one way to get back to Lion is to use Apple's Internet Recovery. Be sure to read about the various procedures before diving headfirst into it, though, as you could (make that "probably will") end up losing data if you haven't backed up properly. Here's a good starting point:

https://support.apple.com/en-ap/HT202294

As for the 5s on iOS 9, I really have been disappointed. I'm hoping 9.1 will make things better.
 
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A shut down iPhone which isn't restartable by pressing the power button has not been shut down, it's crashed.
Thank you! Just because the screen isn't on doesn't mean the phone itself is off.
 
Fortunately I haven't seen any issues on my 6s running 9.0.2 (and both point releases before it). Opted to set up as new rather than restore ancient junk so maybe that has something to do with it.
 
This just happened to me not 1 hour ago. Moreover, my 6s Plus wouldn't turn on after repeated attempts with the on/off button. Tried the DFU start-up and it finally powered back on. Strange, slightly frustrating, and concerning...

(PS. I'm also using 9.1 beta 3, so if it software-based, then the bug is still getting through!).
Me too, iPhone 6s Plus 128GB iOS 9.1 beta 3. Phoned Apple, said to do clean install via iTunes. Reluctant due to lack of compatibility with older iOS backups. Bugger! Urgent update please Apple, then at least we can eliminate software.
 
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An educated guess, but since multiple generations of iPhone seem to be involved, I'm not sure it's correct

that has nothing to do with it as they could be exploiting existing power saving modes of the processor and peripherals that always existed but were never used in this manner before. as an embedded systems developer these sort of extreme power optimizations are very challenging to get right and can increase the risk of this sort of behavior. have seen it happen many times in the field.
 
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Seems like it may be a simple fix but wonder why something of this magnitude wasn't caught in the betas.
 
Maybe because that's not true. Never seen lag or slowdowns after a software update on my iDevices


What ? Aluminum dissipates heat ...


I don't know about Facebook, since I'm not using it ....

Strange, my

"Lmao i cant belieeeve you bought that POS",
"LEL iPhone copehcat Samesung edge trash",
"Enjoyy teh burn-in idiot lololelz",
"Lmao it has an edge, ttl gimmik"
"Njoy no battery lyfe w/ pointless ppi screen"
"Lagdroid needz 64GB ram to turn on torch LMAO"

Samsung Galaxy S6 Edge + is working fine and I can report no shut-offs :p:p:p

What you wanted to say is "is working as fine as it can". It has a lot of graphic lags here and there, just normal lagdroid stuff. My iPhone 6 has graphic lag too when scrolling down on the homescreen for searching, but that's acceptable because nowadays it's a piece of old hardware for peasants and homeless.
 
the average user that still uses a 3-4 years old smartphone hardly notice any issue regarding performances ... you did because you aren't an average user, so you should have avoided upgrading.

In such case try a 4S or iPad 3 with iOS 8. And come back to me.

Ridiculous statement to say those devices perform as well on the latest iOS versus to the native iOS version they came with.

I had no choice.

1. Certain apps forced me to update
2. The Devices had version of iOS 7 installed that were not final and instantly crashed, and since apple would not allow me to update to the last version of iOS 7, do I use a decide that constantly crashes even under safari or upgrade in the hope I can use it.

I known which iOS is best for my device, the problem is appLe will not allow me to install it .

In such case try a 4S or iPad 3 with iOS 8. And come back to me.

Ridiculous statement to say those devices perform as well on the latest iOS versus to the native iOS version they came with.

I had no choice.

1. Certain apps forced me to update
2. The Devices had version of iOS 7 installed that were not final and instantly crashed, and since apple would not allow me to update to the last version of iOS 7, do I use a decide that constantly crashes even under safari or upgrade in the hope I can use it.

I known which iOS is best for my device, the problem is appLe will not allow me to install it .

How do you not notice a performance difference ?

 
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So far no issues with a clean install of 9.0.2 on iPhone 6S Plus 16GB

From a lot I have read it is seemingly affecting those who restored backups

I have restored a previous backup from my iPhone 5S to it and so far no issues running 9.0.2
 
I have two 6 Plus on 9.0.2 so far never experienced such issues.....Never really installed betas, restoration from backup etc....just kept on upgrading!
 
Turn-Off Gate
With my 6+ -not S - I found this with 9.0. Starting with the 8 to 9 update which crashed luckily at end. Also random app crashes of mainstream apps.

9.01 sorted this for me
Main complaint of 9.02 is VPN remains unreliable. Works then crashes. Yes I have uninstalled & reinstalled which was only advice could find on Apple Store.

Think Apple need to finalise OS at least 1month before launch. This releasing of buggy op systems then rushing out fixes is not the way of the company Jobs built
 
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