Battery drain on iPhone 4 after upgrading to Os5

Since upgrading to OS5, my battery goes from 100% to switching off in about 3 hours, even if i don't use it at all which is really frustrating.
Is there anything I can do to either go back to the previous OS or fix the apparant bug?

https://discussions.apple.com/community/iphone/search.jspa?peopleEnabled=true&us erID=&containerType=&container=&spotlight=true&q=ios%205%20battery

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Reception / Battery problems with iPhone 3GS after upgrading to iOS 4.2.1

There are major reception and battery problems with iPhone 3GS after upgrading to iOS 4.2.1.
I can not believe that Apple did not test this for major bugs like this one is.
I am a business user and can not effort to have bad reception. Apple wants to gain in the business clients... I never had this with my former BlackBerrys!
I need a reliable phone not a play thing like this is right now, it just needs it to work propely. And if a major bug like this comes along, fix it immediately. After the iPhone4 story, now this...incredible! Going back to my reliable BlackBerry! It just ain't reliable and takes forever to fix a problem.

I have the same issue after iOS 4.2.1 update. I am using iPhone 3GS officially unlocked by Apple. I tried using different SIM cards and both carriers show same problem when using phone in 3G mode. Phone falls back to EDGE mode showing 'E' from '3G' at start. I have reset the phone and rebooted several times and moved to different cell areas in the city just to verify the problem.
I had no such issues earlier. I also have Nokia E71 which shows full signal and has no such issues.
I have posted the bug on apple iphone feedback page. I hope they Apple will fix the problem and test the release properly on all models before releasing to public.

Over heating and battery drain on iPhone 4 after iOS 7.1 update

I am facing heavy battery drain and overheating after updating my iPhone 4 to IOS 7.1
The battery discharges @ 1% for every minute - when not in use / idle. The handset stays uncomfortably warm. The background app refresh, location services, screen brightness etc have been switched off/kept to the minimum. Though there is significant improvement in responsiveness. There were no battery/overheating issues with iOS 7.0.6.
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This is not a software issue!!!. Yes, it may cause by the software update.. I had the same issue with my Iphone5 after 7.1.. I went crazy .. seeing my battery draining 1% a minute without using it.. and it took more than 7 hours to charge completely. Worst my IPhone was out of warranty cant take it back to Apple to have it fixed.
Things already did -
I changed the battery
Restored the phone
Switched to setting basically nothing
Waited for 7.1.1 to come out and then update the phone
But none of these helped at all
So i rolled the last dice.. took my phone to a local technician (in Philippines). They said none of the above will resolve the issue.
What exactly went wrong was the - USB POWER MANAGEMENT CONTROLLER IC U2 was busted. Once this was replaced my phone worked just fine. in fact I was amazed with the results.
My phone charged 100% from 20% in less than 60 minutes.
Now my battery lasts for more than 15 hours ( i do not use mobile data only Wi-Fi)
So if your phone is out of warranty no harm in getting this part replaced. If within warranty you may get a replacement handset.
Now to what causes this as per the technician " Every update from apple tries to exclude accessories that are not certified, and you do get the pop up that this accessory may not be supported" continue to use the charger will fry the IC U2 .
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Tips to fix battery issue on iphone 4s after upgrading to iOS 6.0

ladies and gentlemen.....i think i found a simple solution but its the only way to fix the problem until apple decides to gives us a patch.
i have an iphone 4s and yesterday i did the upgrade to 6.0
this morning i noticed my battery was draining faster than normal then i decided to do this.
i did a full reset and when i set it up i did it as a new iphone without using any of the restore points.
before you do this you need to make sure your contacts and photos are stored in icloud.
once you are all done with the restore you need to do all the tips for battery life including turning off gps on stuff you dont need and how often data is pushed from the server. one thing i like to do is every morning when i charge my phone is i clear the cache and browser history and close any open apps and then i shut down, wait a few minutes and turn back on
i work on the street nearly 11 hours daily and i listen to music, watch youtube videos, browse the web, use facebook and instagram and by the time i go home i still have 20% left in the battery

The issue is probably specific to your iPhone:
Something may have gone amiss in the upgrade to iOS 6.1.3 on your iPhone.
To correct this follow these steps:
Backup your iPhone using iTunes or iCloud.
Use iTunes to completely restore your iPhone as new.
Setup your iPhone and monitor battery usage to see if it is normal. If not, you may have a hardware problem - if so, contact Apple support.
Restore your iPhone from your backup above.
Check battery usage to confirm that it remains normal.

Huge power drain on iPhone 4 after upgrading to iOS 6

I upgraded my iPhone 4 to iOS 6 yesterday. At 1 pm today I left my house with the phone 100% charged. By the time I got home at 3:30 it was 70% drained! That's in just 2 1/2 hours!
I did use Maps for about 15 minutes each way.
Is this a common issue?
Thanks,
doug

Some apps that didn't work correctly when iOS5 was introduced, needed to be updated after a couple of weeks by the developers as well. Not all 3rd party apps where updated to iOS6 as soon as it got out, some developers wait for wide spread errors to occur, before they start to modify their app. And with all those apps out there, in different combinations on each device, almost anything can be a possible reason for an app behaving strangely after an iOS update.
I'm also running iOS6 on my iPad3 without problems, but as you've said, most of the apps are "made for iPad", maybe a reason for not running into similar problems.
My iPhone4 left warranty as well and I have been thinking about not updating it to the new iOS, but then I just gave it a try. The stuck Wi-Fi problem happened on a iPhone4S though.

IPhone 4S after upgrading to IO6 has a problem with bluetooth in Peugeot 308 No battery status is shown. With 5.1.1 everything was ok.

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https://discussions.apple.com/message/25195858#25195858

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Does anyone know if the iOS6.1 does anything to remedy the increased battery drain on iPhone 4s that was presented with iOS6.0?

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Miracle!!!!!!
The iOS 7.1 update solved the WIFI issues on my iphone.
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how do i activate my iphone 4 after upgrading to ioS 5.1

I'm not sure I understand what you're asking, but I'll try to answer! You can either connect to iTunes and set up and activate there, or you can also use the setup assistant to set up your iPhone. As far as carrier activation, you'll have to follow the protocol that your carrier uses. Either switch SIM card, or call the number they use to allow device activation. Is that what you were wanting to know?

I'm using an iPhone 4 after upgrading to iOS 5 i'm getting an error 1635 now i'm facing problems syncing my contacts and facing many problems, i have restored my iPhone but still i'm getting the same error

i'm using an iPhone 4 after upgrading to iOS 5 i'm getting an error 1635 now i'm facing problems syncing my contacts and facing many problems, i have restored my iPhone but still i'm getting the same error

Did you check your security software settings? eliminating conflicts from third-party security software.

Why can't i activate my iphone 3gs after upgrading it to ios 6?

why can't i activate my iphone 3gs after upgrading it to ios 6?
It says,
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Kayl07

There are several common causes for this problem:
Your security software (Antivirus, firewall, router settings) is blocking access to gs.apple.com, Apple's activation servers. Try temporarily disabling your security applications on your computer.
You have a redirect in your hosts file that defines a different IP address for gs.apple.com. you must delete all references to gs.apple.com from your hosts file (c:\windows\system32\drivers\etc\hosts, or /etc/hosts on a Mac)
Your phone is jailbroken or otherwise hacked.

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I am experiencing the same issue and could use some advice:
Yesterday I plugged my Iphone 3GS into my computer and I selected in Itunes to update to the latest IOS 5.1.1.
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Battery drain on iPhone 4 after upgrading to Os5

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