3GS wont sync on iTunes since iOS4 upgrade

Hi,
Since downloading the new OS my phone will not sync properly and I get the below message :
'iTunes could not back up the phone because an unknown error occured (-20)'
Has anyone else had (and fixed) this problem??
If you fixed it can you let me know how??
Ta

I talked to tech support today. They were very helpful. Basically, I had to go and re-download each app even though they show up in my app section. Then I could move them normally. Unfortunately, I think I have lost most of my data.

Similar Messages

  • My iphone 3gs wont sync with itunes

    When i connect my phone to the computer it comes up with an error message unable to read device or unable to read disk. Someone please help!!! How do i fix this?

    Try Recovery mode.
    <http://support.apple.com/kb/HT1808>

  • Why my ipad doesn't sync wi-fi since I upgraded to iOS 5.1 and iTunes 10.6.0.40?

    why my ipad doesn't sync wi-fi since I upgraded to iOS 5.1 and iTunes 10.6.0.40? I have a pc running windows 7 and my Bonjour service is started. I use the Remote app (airplay) normally but the ipad doesn't appear listed in iTunes to sync wi-fi.

    Is your iPad recognized by iTunes when connected to your computer via USB?
    If so, does Sync with this iPad over Wi-Fi remain selected under the Summary tab for your iPad sync preferences with iTunes?

  • I created a password to my iPad as a parental restriction, but my daughter played with it and pushed the wrong password 10 times my ipad was disabled, what should i do, since it wont sync with itunes becoz it will just say, cannot sync files becoz the dev

    i created a password to my iPad as a parental restriction, but my daughter played with it and pushed the wrong password 10 times my ipad was disabled, what should i do, since it wont sync with itunes becoz it will just say, cannot sync files becoz the device is password enabled, Please somebody helpme

    If you are talking about the passcode that gains access to the iPad - you will have to restore your iPad in order to unlock it. You will want to use the last computer that you synced with so that you can recover all of your app data, settings, etc. this explains how to restore the iPad. At the end of the process restore from your backup as described.
    http://support.apple.com/kb/HT1414
    If iTunes will not let you restore that way, you may need to use recovery mode to restore, and you can read about that process here.
    http://support.apple.com/kb/ht4097
    IF - you are talking about a restrictions pass code that you put on the device to restrict content or downloading apps or something like that - you do not want to restore from the backup - because that backup will contain the passcode that you cannot remember and you will end up where you started.

  • Iphone 3gs cannot sync to itunes

    why my iPhone 3gs cannot sync to itunes? after i click synced, the phone seemed to sync to itunes but when it's about to complete, itunes cancelled the sync. WHYYYY? I've been having this problem since i've updated my iPhone to iO5.

    Two things to try:
    If you have a Windows computer open a Command window and type:
        netsh   winsock   reset
    If this doesn't fix it, or if you have a Mac, your current backup may be corrupted. Delete it by going to iTunes Preferences, Devices tab, highlight the backup and delete it.
    And if this still doesn't fix it, you may have a badly corrupted backup. Delete it manually by going the the Backup folder and deleting everything in it. You can find it as follows:
    Mac OS: ~Library/Application Support/MobileSync/Backup
    Windows XP %AppData%\Apple Computer\MobileSync\Backup
    Windows Vista and Windows 7: %AppData%\Roaming\Apple Computer\MobileSync\Backup

  • AppleTV not appearing/syncing in Itunes since the UK film roll out...

    I know there are post on this already, but I've never had any problems at all with my AppleTV being recognized or syncing with Itunes since before now... I'd got a bit giddy with excitement over the roll out of the films on iTunes, so I decide to download a rented one from iTunes (no menu option to do this on the AppleTV at this point. The download went pretty smoothly taking an hour or so, and I was able to move it over to the AppleTv.
    Interestingly enough the new Movie menu options had now appeared after being received. I had made sure that the AppleTV was up to date before this I may add and didn't have any further upgrades, so how did it get the new menu options?? So after that I noticed I was able to browse and buy films directly from the AppleTV ( but I have not tried this yet) Anyway...
    I watched the rented film, and it was fine, all went smoothly, told me I had one more day to before I'd lose it... Shortly after watching it the iTunes I sync with on my MAC lost connection. Not a sign of it. Factory reset the AppleTV, re-installed iTunes. Nothing... Then I tried connecting from the AppleTV by syncing a new computer with the 'four digit code' And hey presto invoking that procedure brought up the AppleTV back in my devices on iTunes.
    So.... Now all have to do is sync everything over again, fine, take a few hours I know. After three hours and more the sync freezes, so I cancel it. And guess what folks! No AppleTV in my devices as before.
    Now as I say at the beginning of this post, I've never had a problem with syncing with AppleTV, I believe the introduction the films to iTunes has introduce a software bug, or maybe made an existing one worse!

    Yeah ,this only worked temporarily. I don't know what's going on with my router and my AppleTV but it's proving impossible to reliably sync to the AppleTV when both the AppleTV and my iBook (the syncing computer) are connected to my router wirelessly. Sometimes, fiddling with the router fixes it, sometimes rebooting the AppleTV fixes it, but invariably, the time comes when I can ping and see the AppleTV from my desktop (connected to the router via ethernet) and not from the iBook (connected wirelessly)

  • IPhone wont sync to iTunes running Hackintosh

    Hey guys -
    Hoping someone can help. My 3GS (running 4.0.1) wont sync with iTunes anymore on my Dell running Hackintosh. It was working fine up until a week ago and then I had to reinstall the OS. Now the only way I can get it to sync is to reinstall iTunes, however everytime I shutdown the computer the iPhone wont sync again. iPhoto has no issues with seeing the phone.
    Any ideas? Thanks!

    i have same problem and try many things to fix it but dose not work.
    please we need help.

  • My ipod nano will no longer sync with itunes since i have purchased an iphone 4s and synced it with itunes.

    My ipod nano will no longer sync with itunes since i purchased an iphone 4s and synced the phone with itunes.  When I plug my ipod into my imac, it does not even read or recognize my ipod.  What do i do?

    Are you using the original cable that came with Nano and not your iPhone's cable?  Have you worked through the troubleshooting in this Apple support document?
    http://support.apple.com/kb/TS1410
    B-rock

  • I've just signed up to iTunes Match as I have songs on my iPhone 4 which wont sync with iTunes as they are from CDs but I can't see my music in the cloud now. Anyone had the same problem and have an easy fix?

    I've just signed up to iTunes Match as I have songs on my iPhone 4 which wont sync with iTunes as they are from CDs but I can't see my music in the cloud now. Anyone had the same problem and have an easy fix?

    What fixed it for me:
    On your computer, open iTunes > My iPhone (or whatever name you gave your iPhone) > "Music" page
    Uncheck "Sync Music"
    Click "Sync" button (bottom right)
    Let it run and finish
    Uncheck the box for every song, playlist, etc.
    Click "Sync" button (bottom right) (This step may be unnecessary, but I did it and got the result I wanted.)
    Let it run and finish
    Check the boxes for the music you want on your iPhone
    Click "Sync" button (bottom right)
    Let it run and finish
    See if that doesn't work for you.  I tried a lot of things that did nothing, but this seems to have fixed it, and quickly.

  • Ipod Touch (First Generation) Wont sync to Itunes

    My Ipod touch 1st generation wont sync with Itunes but it is recognized on the computer i have the 2.1 software. i havent synced my ipod to this computer for probably three months becuase i usually sync it at my dads house. THANKS!!

    Try updating your iTunes, I had a similar problem with mine!

  • Just bought an ipod touch and it wont sync with itunes. Tried resetting sync history but doesnt work, plus when i try to access itunes preferences it freezes for ages and creates loads of distnoted.exe files?????

    Just bought an ipod touch and it wont sync with itunes. Tried resetting sync history but doesnt work, plus when i try to access itunes preferences it freezes for ages and creates loads of distnoted.exe files?????

    Just realised when reading other peoples problems that it is not actually letting me reset sync history???

  • My ipod touch 4th gen wont sync with itunes 11

    My ipod touch 4th gen wont sync with itunes 11, keeps getting so far then times out.
    Ive tried resetting it but doesnt seem to help.

    Try rooboting the computer.
    Try different cable and USB port
    Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7
    or
    Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP

  • My Ipod wont Sync with ITunes! Please Help!

    My Ipod wont Sync with ITunes! Please Help! I have the latest version of Itunes, but my ipod will not sync with my laptop. The diagnostic test has no answers and says everything is normal. When i try to sync, it says "an unknown error occurred (-39)". Any suggestions?

    check for any viruses

  • I just recently upgraded from a 3gs to a 4s and since i upgraded text messages are not coming in or going out unless i'm texting another iphone?

    I just recently upgraded from a 3gs to a 4s and since I upgraded text messages are not coming in or going out unless I'm texting another iphone?

    http://support.apple.com/kb/TS2755

  • My iphone 4 is locked up and wont sync to itunes what do i do, my iphone 4 is locked up and wont sync to itunes what do i do

    my iphone 4 is locked up and cant remember my passcode and it wont sync to itunes how would i restore it and my lock button dont work

    power down your phone and unplug from your computer
    hold down the home button then plugin and wait till you get a message about an iphone in recovery mode
    follow the instructions on screen to restore your phone
    (this will wipe out your phone but it is the only option other than remembering your passcode)
    in the setup screen after its restored you can restore information from icloud or a backup given you have one

Maybe you are looking for