iOS4 update - now iPhone now reboots during phone call

Seriously Apple..

A simple swap is no option for me, I would have to send the phone in, and wait a couple of weeks for a replacement. This is a software issue, so fix it. Meanwhile just release a statement that you are aware of the issue and working on it. Does Apple release such statements? Not too familiar with their usual policy..

I did some tests today and i could not find any difference if a call is inbound or outbound. But what seemed to make a difference is, if you have the phones proximity sensor activated. I had the phone on the table with the glass side upwards and could hold two calls for more than 30 minutes without any trouble. then i turnd the phone with the surface downwards, so the proximity sensor was acivated and about 6 to 8 minutes later the phone rebooted. another call with the surface downwards also led to a reboot after about 10 minutes. that could also be the reason why handsfree calls seem to work properly.

I went yesterday to the nearest Apple Store (an hour or so away) and they rang today to say a replacement was in for me, I can't get there til Saturday, but that's the best service I could ask for really as they didn't have one there yesterday. Hopefully I'll get one that doesn't do it!

I should add that my friend has the same phone and his update went smoothly with no rebooting, so Marginal hardware has to be a problem, parts being right at the extreme of spec.

Seb

Message was edited by: Ihavenoideas

I did some tests before and the problem is probably related to the proximity sensor of the iPhone. I could hold 2 calls for more than 30 minutes without reboot, when the phone was with the surface upwards on my desk. then i turned the phone over with the glass downwards, so the proximity sensor was activated and a couple of minutes later the phone rebooted. Another call with the surface downwards ended again after approx. 10 minutes. I don't want to claim that this is the problem, but for now it seems to me that there is a relation between the sensors and the rebooting problem.
Has anyone got a satisfying answer from apple?

I also have noticed a link between the proximity sensor and this issue for me. If the phone goes into call mode (blank screen, controls disabled) due to the proximity sensor, it doesn't want to come back out.

I'am in France and i've the same problem, reboot after 4min with a call. After two restores i tested an another one without sync with itunes ( I had a call after the restoration, but without sync anything with itunes) conclusion : no reboot.
After that, i was synchronized (contact and apps) and .... call... and reboot!
I'm trying with another computer, with a nude itune.

ok totally far out, but if i ring my sister on the same network then it doesn't cut out.... if i ring my dad on a different network its 6minute drop outs??

Now i am very confused - both times had phone to ear!

Hello again,

After a day's troubleshooting I am no further forward with pinpointing the problem. Very frustrating.

First of all - I don't think this has anything to do with a replacement non-OEM battery. Okay, so there may be some people out there who have replaced their own batteries and are experiencing this issue but the majority of users affected are running sealed devices that have never had a battery replacement - including me.

Anyway, the reason for this post is that I thought I had a breakthrough this morning. I re-applied the original firmware downloaded from Apple, chose not to restore my data from backup, chose not to sync apps and changed the phone name to be different to the name I used with 3.1.3. Didn't set up mail, wi-fi or anything else and went straight ahead and made a test call - the phone kept the call for 35 minutes without rebooting, and did not reboot after I cancelled the call. Good news.

The next step was to configure wi-fi and mail. Still no apps at this stage but I was trying to isolate the problem. The call was dropped after 17m 20s.

I then removed my mail accounts, removed the wi-fi settings and re-booted the phone. Another test call continued going for 30 minutes without failing and so I decided to end the test. It was starting to look like it's Exchange/Wi-Fi related.

Next test - add my Gmail account via Exchange Sync and make test call. This time the call dropped out after only 5m 13s.

My final test was to remove Exchange, add Gmail IMAP sync as my mail sync, CalDAV for calendar and place a test call. This time it didn't even make 5 minutes before dropping out.

So in summary, the problem doesn't seem to be mail or wi-fi related. It's not app related. It's not data restore related. It seems there is something inherently wrong with iOS4 and certain handsets but I have no idea why.

One thing I would add is that I covered the proximity sensor for EVERY test as I'd read that other people suspected this to be the problem - as you can see from the results above, the length of time varied greatly from below 5 minutes to over 30 minutes so again, I'm not sure the sensors are the problem. All I know is that I seriously need this fixed or will lose customers!

Disappointing.

Hi everyone,
Had a similar problem myself and narrowed down it to watchdog stuck event coming up randomly and causing the reboot.

To find out whether it is same issues, you can download iphone configuration utility from apple and look at the console log there. The last message before the reboot will probably give a hint on what went wrong.

rajendra

That's interesting - I completely forgot about the console log... Mine is full of entering low power / power on / OK to sleep / Wake from sleep combinations.

I'm sure it'll be useful to Apple when they get it back. It's not that useful to me as a phone at the moment!

I dont know if my problem is related to the problem that you all seem to be having but here goes....My phones recently gone in for repair (Im still waiting to have it back) because it kept on shuting down intermitantly, I could be in a phone call or even using an app it doesnt matter.
The difference is that im still on 3.1.3, The one thing i did notice though is that each time it shut down my battery level suddenly drops from as much as 100 percent to virtually nothing in an instant. When the phone is rebooted i notice the battery level is virtually zero then shoots back up to its previous level.
Like i say it may have nothing to do with your issues concerning OS4 but the problems are very similar.

Hi all,

I think I've found the reason for the reboots during calls. I think the iPhones are overheating.

As you can see from my previous posts I've been working on this all day today to try and pinpoint the problem. After hooking up the configuration utility, I see exactly the same sequence of events occurring just prior to an on-call reboot.
Here's an extract from the log:

Thu Jun 24 22:12:38 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277413956, lastupdate = 1277413874
Thu Jun 24 22:12:58 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277413976, lastupdate = 1277413874
Thu Jun 24 22:13:18 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277413996, lastupdate = 1277413874
Thu Jun 24 22:13:28 unknown SCHelper[58] <Notice>: active (but IDLE) sessions
Thu Jun 24 22:13:28 unknown SCHelper[58] <Notice>: 0x1032a0 {port = 0x1907, caller = Preferences(59):com.apple.settings.wi-fi, path = /Library/Preferences/SystemConfiguration/preferences.plist}
Thu Jun 24 22:13:28 unknown SCHelper[58] <Notice>: 0x102a40 {port = 0x1e9b, caller = SpringBoard(28):com.apple.preferences, path = /Library/Preferences/SystemConfiguration/preferences.plist}
Thu Jun 24 22:13:38 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414016, lastupdate = 1277413874
Thu Jun 24 22:13:58 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414036, lastupdate = 1277413874
Thu Jun 24 22:14:08 unknown configd[24] <Error>: watchdog: did not receive thermal notification in time: 0x0000003b
Thu Jun 24 22:14:18 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414056, lastupdate = 1277413874
Thu Jun 24 22:14:38 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414076, lastupdate = 1277413874
Thu Jun 24 22:14:58 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414096, lastupdate = 1277413874
Thu Jun 24 22:15:18 unknown CLTM[24] <Error>: CLTM: stale battery temp: now = 1277414116, lastupdate = 1277413874

It looks to me that the temperature starts to rise and then the "watchdog" process awaits for an update to confirm that the temperature has stabilised. When this doesn't happen, the phone reboots - either, I assume from overheating or as a safety precaution.

The KEY POINT is that throughout today when I've tested calls successfully for periods of over 30 minutes, these temperature warnings did not show up, or only a couple show up during the reporting period.

My guess is that there is a slight hardware revision difference between the handsets that are experiencing the problem, and those that aren't. I know a couple of people with newer handsets than mine on different networks with no issues running iOS4 and the fact there aren't more replies to this topic would help confirm this.

I have a Genius appointment booked for tomorrow so will feedback after that.

APPLE - I have the logs here showing the reboot and non-reboot reporting windows.

CB

I would like to add to the growing list of 3GS owners/users getting the reboot problem during phone calls. Using a 32GB 3GS bought at launch last year. No real pattern to the reboots, after 5 mins talking its a lottery as to how long I will get before it reboots.

One thing I will add is that during the last 2 calls where it occurred earlier this evening I did take the handset away from my ear, checked the call duration time, then put the handset back to my ear and then it rebooted - this may be related to the sensor issue highlighted in previous posts?

Anyway, very frustrating and frankly disappointing there hasnt been official news/release about this from Apple - I for one will give it until next week before marching to my local O2 store and demanding a replacement handset (nearest Apple store to me is over 150 miles away so O2 are only option).

Message was edited by: adzz_78

i have the same problem here in germany my phone is 3 months old, after the upgrade to IOS 4 it reboots after a couple of minutes. For testing i have closed all apps in the Multitaskbar without a change.

All other functions e.g. wireless, mail over IMAP, TomTom Navigation 1.4 are working very well without rebooting.

Now i'm on a point looking to apple and waiting for emergency fix Firmware Update.

I've had the same issue with my 3GS rebooting a few minutes into a call after upgrading to iOS4. It's only 6 months old and has worked perfectly up to this point.

I did try shutting down everything in the taskbar on a hunch that it might be to do with multitasking and then managed a 17 minute call with no problems. It might be a fluke, but I'll try again today and see what happens. Might be interesting to see if this works for anyone else (don't blame me if it doesn't though!).