Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Level 1

4 points

iPhone 3GS reboots during your phone call after updating to OS4

I have a major problem with the OS4 update on the iPhone 3GS. After I updated my iPhone 3GS, I can no longer make telephones calls longer then 10 - 15 minutes. After 10 -15 minutes the phone cuts out and I see an Apple symbol. After it's rebooted, I can make another telephone call but the iPhone reboots consistently again after 10 – 15 minutes. Can anyone help with this? Where on apples website can I submit this problem?

I have also noticed that the iPhone now heats up more quickly and the battery consumption is eaten rapidly. How do I fix this?

And before you ask, this never happened before in the previous OS3.

iPhone 3GS 32GB, iOS 4

Posted on Jun 22, 2010 1:40 AM

50 replies

Dec 7, 2010 12:53 AM in response to delahn

I have the same problem. iPhone 3GS + iOS 4.2 reboots during a call.

sonic910

Level 1

0 points

Dec 13, 2010 1:22 AM in response to SpiderMac

my iphone 4 has started playing up since the last os upgrade 4.2. the phone restarts itself during a call and apps just shutdown?

Dec 13, 2010 1:40 AM in response to delahn

Hello all,

After weeks of putting up with this issue I called Apple today. The fella sold me $99 worth of AppleCare first but then asked if I'd restored the phone, which I had back to factory defaults. But then he got me to turn the iPhone off, remove the SIM card, turn it back on, turn it off, replace the SIM and turn it back on. I have since made several calls to mobiles and land lines including one call of 15 minutes and it has not rebooted. Here's hoping it was a simple fix that did the trick!

Good luck,

Steve

tirzah2

Level 1

0 points

Dec 13, 2010 2:19 AM in response to delahn

Try switching to 2G

sonic910

Level 1

0 points

Dec 13, 2010 3:06 AM in response to tirzah2

Thanks Steve 1974, I tried your solution and all seems well. the real test will be back in the work environment tomorrow.
Anyhow thanks again and to tirzah2
Why?
2g I may as well have a bloody nokia 5300 etc.

Dec 15, 2010 6:43 PM in response to sonic910

Sorry folks. After 3 days of no reboots I got a call today that rebooted after 4 or 5 mins.

Dec 21, 2010 8:18 PM in response to delahn

PROBLEM RESOLVED
I to have had the same problem as every one else on both my phone and my wives phone after upgrading to OS4.1 But I have finally resolved the problem and I would like to share it with everyone else and hope this helps others.

Ok after trying everything nothing worked but I started to read on some forums that by changing the battery everything goes back to normal, so being desperate I thought I’d give it a go so I went to EBay and found two original batteries and I bought them.

Now the thing is because I was inpatient thinking this may fix it I pulled my phone apart removed the battery and tried two of the 3g batteries I had to see what happens.
I can tell you it doesn’t work the phone started to do continuos reboots so their must be a difference in the chip they have otherwise they look identical.

I figured I’ll have to pull it apart and put my original battery back in for now until I get the new ones and to my surprise no more problems all my problems have disappeared I did the same to my wives phone I took the battery out for five minutes put it back in and ones again problem solved.

So the problem is somehow the operating system got corrupt or didn’t install properly or something like that but because I don’t know much about Apples platform I can’t really say. If this was a windows based phone I would conclude by saying somehow the Bios got corrupt and so it needs a reset, well I have had this problem many time before on widows based Desktops and the only way to fix it is by switching the power off and removing the bios battery for a few minutes while pressing the power button do discharge any capacitors that are still holding power. These phones are impossible to completely reset because their batteries are built in and really this was my biggest concern when I bought the phone I always thought what do you do if your phone freezes how would you reset it you cant simply pull the battery out.

Dec 22, 2010 4:22 PM in response to NIKKOH007

Wow - someone with a logical fix ! Thanks for your input NIKK...Has anyone else tried this ? Now here's a thought - Do you think you can achieve the same result by draining the battery down as low as possible for a while, then re-charging ? Could there be an app for this that would be easier than taking the phone apart ?

Dec 23, 2010 10:01 PM in response to Thephotofinder.com

Draining down the battery won't work to achieve a proper reset you have to take the battery out you will know when you have done a proper reset because you will loose the time and date settings buy letting the battery drain even as mush as the phone switching off it still wont work because when you fully charge the battery again it will have still kept the date and time settings because that little bit off battery power keeps the memory and settings intact and any errors in that memory to.

sonic910

Level 1

0 points

Dec 30, 2010 3:50 PM in response to steve1974

In the end I had to do a complete reinstall ie as a new phone.about 4 hrs down time. no problems anymore after almost 4 weeks.

Jan 20, 2011 1:34 AM in response to delahn

I have had the same problem with a 3gs 32gb with latest software as 20.01.2011, and it seems to me that the phone is not resetting its self completely when being turned off and maybe the memory is being used up?
I recently reset my phone from my wives backup in itunes, which was not having the same problem, and now when i turn the phone off, and then back on, all recently open apps are now closed and need to restart the apps to use them, where as previously they remained open.
This has solved the problem of phone turning off after about 5mins of call time and trying to reset its self.
I have tried resets as new device etc, and tried at least 10 other fixes, with no success, but this has definitely solved the problem.

malky511

Level 1

0 points

Jan 26, 2011 11:12 AM in response to johninaustria

I have the same problem and yet apple have posted no response. i have found out that during a call if you use the speaker and have the phone away from your face the problem dissapears...!!!
i am wondering if there is a software or hardware issue with the light sensor on the front of the phone.
time to phone apple again i think....!!!

Apr 15, 2011 2:07 AM in response to delahn

Hi guys, today I got so ****** off with this problem, that I went to apple, and they fixed it.
When you close an app by pressing the home button, it is not actually gone, it has just minamised it. The iPhone can not coap with all the apps running and a phone call , so it reboots. So to sort this:

First double click the home button then along the bottom of the screen all the apa that are open will apeare.
Then hold your finger down on one of them and a little red minus sighn will apeare tap the minuses, and u will close the apps! This process does not delite the app. Your iPhone will be working much less hard to keep them all open and will now be able to make a phone call

stegbhoy

Level 1

0 points

May 5, 2011 1:23 PM in response to iphone problem, has yours been

Cheers just done that.I had 56 apps open have closed them all.

Didnt know you had to close them like that thought when you pressed the home button that was them closed

Just used the phone twice and never cut out or restarted.

I phoned my wifes phone and left it on for around 30min everything ok

Then she phoned me for 40 min and everything was ok aswell

This has fixed the problem cheers .🙂

May 12, 2011 9:07 AM in response to delahn

Same problem here, 16GB 3GS. Tried all the voodoo solutions - re-insert the sim card, let the battery drain until phone turns off (and then some), mind the number of running apps, switch to/from 3G, etc. For good measure, I ordered a new battery from ifixit and installed it last week. Unsurprisingly, this fixes nothing. I wonder why people think something as simple as a lithium ion battery protection circuit would make a difference (but hey, at least I have a fresh battery now). Same story for number of open apps. Applications being in use/in the foreground get allocated the memory needed, and the memory contents of apps not used in a while get swapped out to storage. Just like any present day operating system. CPU cycles are irrelevant. A 600MHz CPU provides more than enough power to make a phone call and keep dozens of apps dormant at the same time.

I have made calls up to half an hour without issue, so I understand why one would think the problem is solved if one were to make a call taking that long. Problem is, this issue can still creep up on you. Like it did today. Got a call, switched ears a couple of times because I was busy with something, and bam, reboot. And pretty quick too, couldn't have been more than four minutes. A New Record (for me at least). And as always, no sim unlock prompt, and all open apps still running (or re-opened, not sure).

As far as I am able to assess, the only non-voodoo solution is either Apple realizing that they should keep ALL of their customers up and running, or JB'ing the device and replacing the mobilewatchdog file with the iOS 3 version.

The most revolting is actually that Apple pretends that this problem doesn't exist. But literally thousands of posts on this forum say it does.

iPhone 3GS reboots during your phone call after updating to OS4