Constant restarts iPhone 4 iOS 7

When I installed iOS 7 I constantly restart the iPhone 4. What I can do to fix it?

I'm having a similar problem on the iPhone 4, mine randomly restarts for no apparent reason, it's done it twice today.

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    thank you in advance.

    Your suggestion worked perfectly.  I can't believe there is nothing in any of the instructions I have seen online at the Yahoo and Apple help sites about the making sure the right default account is checked.  I don't think I was even aware there was a "default account" setting.  Thank you so much.

  • Slide to unlock doesn't work happend more than 8 time every time i had to restart my phone, Please can you tell me how to fix this bug . iPhone 5, iOS 7.0.4

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  • HT1430 how i restart iphone 5s which get off during ios update?

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    Then you can restore your phone: http://support.apple.com/kb/HT1414

  • Iphone 4s(ios 7) hangs after i reject calls by pressing the on/off button while it is in the lock screen.I restart the phone every time when i reject calls..what can i do ?

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  • My iPhone 4s iOS 7.0.4 will not update music or apps from iTunes 11.1.3.  this was true of my pc and the new MacPro.

    My iphone 4s ios 7/0/4 will not update music or apps from itunes 11.1.3.  this was true with my pc since ios 7.0.3 even with update 7.0.4 and now continues with my new MacPro also runing itunes 11.1.3.   as most state in previous threads, syncs all non itunes related data with no issue and appears to work correctly on itunes data but then hangs on the last step of updating until it times out.  i have tried marking specific music to transfer, setting up new playlist, deleting some old playlist on phone but stopped short of restoring my phone back to new due to the amount of non itunes data that i will lose.  The itunes setup on the macpro was completely with the download of all music from a previous external backup and the creation of new playlist - on the first sync with existing phone it did ask to overwrite all phone itunes data with macpro itunes data which i did accept - no different result - no changes on phone.

    Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved. 
    If the problem continues, take the device to Apple for evaluation and possible replacement.

  • ITunes 11.3.1(2) (on Mavericks 10.9.4) crashing on sync with iPhone 5S (iOS 7.1.2)

    Hi Apple Community
    I recently excitedly upgraded my early 2011 MacBook Pro from OS X Lion to OS X Mavericks but have been experiencing troubles with iTunes since.
    When I connect my iPhone 5S (iOS 7.1.2) it opens up in iTunes as normal, but when I hit 'Sync' in the music or podcasts tab, iTunes instantly crashes. Somehow, between the crashing, although iTunes has refused to do a positive or 'additive' sync (if we think of it as adding new content), it has managed to 'negatively' sync in that it has removed all the audio content that was on my iPhone.
    So now I am completely music-less and podcast-less, and my commute *****!
    I don't have the technical knowledge to make sense of the crash reports, but what I do know is this:
    - The Crash Thread number is variable i.e. is different each time
    - The Exception Type is always EXC_BAD_INSTRUCTION (SIGILL)
    - The Exception Codes are always: 0x0000000000000001, 0x0000000000000000
    - The Crash Threads itself is actually identical each time, as is the accompanying error code (although I don't actually know what they mean...):
    Example A)
    Thread 23 Crashed:
    0   com.apple.AirTrafficHost       0x0000000119334000 0x1192c7000 + 446464
    1   com.apple.AirTrafficHost       0x00000001193362c9 0x1192c7000 + 455369
    2   com.apple.AirTrafficHost       0x00000001193216ca uhO2GULXwfgKwPcp4YR2 + 4346
    3   com.apple.AirTrafficHost       0x00000001192c86bf ATHostConnectionSendSyncRequest + 147
    4   com.apple.iTunes               0x000000010b521190 0x10b166000 + 3912080
    5   com.apple.iTunes               0x000000010b89468f 0x10b166000 + 7530127
    6   com.apple.iTunes               0x000000010b16af02 0x10b166000 + 20226
    7   libsystem_pthread.dylib       0x00007fff94f93899 _pthread_body + 138
    8   libsystem_pthread.dylib       0x00007fff94f9372a _pthread_start + 137
    9   libsystem_pthread.dylib       0x00007fff94f97fc9 thread_start + 13
    Thread 23 crashed with X86 Thread State (64-bit):
      rax: 0x000000011655c200  rbx: 0x000000011655bfa0  rcx: 0x000000011655c060  rdx: 0x0de729f475d9b8a3
      rdi: 0x000000011655bfa0  rsi: 0x0000000000000001  rbp: 0x000000011655c030  rsp: 0x000000011655bf08
       r8: 0x000000007ef66bdd   r9: 0x00000000d348504b  r10: 0x00000000627902ec  r11: 0x0000000026319613
      r12: 0x00000000bac7cf4f  r13: 0x00000000511b932f  r14: 0x0000000038b38dae  r15: 0x0000000063ed1573
      rip: 0x0000000119334000  rfl: 0x0000000000010246  cr2: 0x0000000119334000
    Logical CPU:     2
    Error Code:      0x00000000
    Trap Number:     6
    Example B)
    Thread 27 Crashed:
    0   com.apple.AirTrafficHost       0x000000011a202000 0x11a195000 + 446464
    1   com.apple.AirTrafficHost       0x000000011a2042c9 0x11a195000 + 455369
    2   com.apple.AirTrafficHost       0x000000011a1ef6ca uhO2GULXwfgKwPcp4YR2 + 4346
    3   com.apple.AirTrafficHost       0x000000011a1966bf ATHostConnectionSendSyncRequest + 147
    4   com.apple.iTunes               0x000000010c2c3190 0x10bf08000 + 3912080
    5   com.apple.iTunes               0x000000010c63668f 0x10bf08000 + 7530127
    6   com.apple.iTunes               0x000000010bf0cf02 0x10bf08000 + 20226
    7   libsystem_pthread.dylib       0x00007fff94f93899 _pthread_body + 138
    8   libsystem_pthread.dylib       0x00007fff94f9372a _pthread_start + 137
    9   libsystem_pthread.dylib       0x00007fff94f97fc9 thread_start + 13
    Thread 27 crashed with X86 Thread State (64-bit):
      rax: 0x000000011bc1c200  rbx: 0x000000011bc1bfa0  rcx: 0x000000011bc1c060  rdx: 0x0de729f475d9b8a3
      rdi: 0x000000011bc1bfa0  rsi: 0x0000000000000001  rbp: 0x000000011bc1c030  rsp: 0x000000011bc1bf08
       r8: 0x000000007ef66bdd   r9: 0x00000000d348504b  r10: 0x00000000627902ec  r11: 0x0000000026319613
      r12: 0x00000000bac7cf4f  r13: 0x00000000511b932f  r14: 0x0000000038b38dae  r15: 0x0000000063ed1573
      rip: 0x000000011a202000  rfl: 0x0000000000010246  cr2: 0x000000011a202000
    Logical CPU:     3
    Error Code:      0x00000000
    Trap Number:     6
      Example C)
    Thread 26 Crashed:
    0   com.apple.AirTrafficHost       0x00000001140c1000 0x114054000 + 446464
    1   com.apple.AirTrafficHost       0x00000001140c32c9 0x114054000 + 455369
    2   com.apple.AirTrafficHost       0x00000001140ae6ca uhO2GULXwfgKwPcp4YR2 + 4346
    3   com.apple.AirTrafficHost       0x00000001140556bf ATHostConnectionSendSyncRequest + 147
    4   com.apple.iTunes               0x0000000106012190 0x105c57000 + 3912080
    5   com.apple.iTunes               0x000000010638568f 0x105c57000 + 7530127
    6   com.apple.iTunes               0x0000000105c5bf02 0x105c57000 + 20226
    7   libsystem_pthread.dylib       0x00007fff94f93899 _pthread_body + 138
    8   libsystem_pthread.dylib       0x00007fff94f9372a _pthread_start + 137
    9   libsystem_pthread.dylib       0x00007fff94f97fc9 thread_start + 13
    Thread 26 crashed with X86 Thread State (64-bit):
      rax: 0x0000000115feb200  rbx: 0x0000000115feafa0  rcx: 0x0000000115feb060  rdx: 0x0de729f475d9b8a3
      rdi: 0x0000000115feafa0  rsi: 0x0000000000000001  rbp: 0x0000000115feb030  rsp: 0x0000000115feaf08
       r8: 0x000000007ef66bdd   r9: 0x00000000d348504b  r10: 0x00000000627902ec  r11: 0x0000000026319613
      r12: 0x00000000bac7cf4f  r13: 0x00000000511b932f  r14: 0x0000000038b38dae  r15: 0x0000000063ed1573
      rip: 0x00000001140c1000  rfl: 0x0000000000010246  cr2: 0x00000001140c1000
    Logical CPU:     0
    Error Code:      0x00000000
    Trap Number:     6
    Steps taken so far:
    - I started by restarting iTunes and restarting my MacBook
    - When this didn't work, I backed up my iPhone, wiped it, and restored it
    - This didn't work either, so I kept searching and I read elsewhere in the Apple Forum to go into the Library and delete the iTunes preference files: I trashed com.apple.iTunes.secure.plist and com.apple.airport.opproam.plist (because I thought this might be connected to com.apple.AirTrafficHost, which appears in the crash threads)
    BUT ALAS! To no avail.
    Can anyone help?
    I would have uninstalled and reinstalled iTunes too, but can't figure out how to do this as it's integral to Mavericks and I'm not advanced enough to know how to bypass the protection on it. 
    Am I going to have to resort to wiping my Mac and reinstalling Mavericks? I'm not vehemently opposed to doing this, but just perplexed and frustrated at having so much difficulty with the newest Mac OS, the newest version of iTunes and the newest iOS.... (or at least, the newest available to the general UK public). Besides, I just did this whole process to go from Lion to Mavericks and it's a total faff.
    Out of interest, does anyone know what the above code is? If a code at all? Or is it a programming language? How can I learn to interpret and manipulate it for myself?
    MASSIVE THANKS to anyone who has actually read all the way through this post!
    And even bigger thanks to anyone who is willing to offer their input
    S

    Linc,
    I too am having a big issue with my iPhone 5s not being able to sync with iTunes 11.3.1 with my 15" mac book pro on os x 10.9.4
    iTunes will rarley start up fully, when it does and my iPhone 5S is plugged in the iPhone tab is not available and the thinking wheel spins and spins.
    Here is some information based on your reply to the post above. 
    Step 1
    8/13/14 2:19:37.100 PM spindump[11046]: Saved hang report for iTunes version 11.3.1 (11.3.1) to /Library/Logs/DiagnosticReports/iTunes_2014-08-13-141937_-MacBook-Pro.hang
    8/13/14 2:56:52.000 PM kernel[0]: hfs: mounted iTunes on device disk2s2
    8/13/14 2:56:52.548 PM mds[36]: (Normal) Volume: volume:0x7fcb93058000 ********** Bootstrapped Creating a default store:1 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/iTunes 1
    8/13/14 3:00:48.000 PM kernel[0]: hfs: unmount initiated on iTunes on device disk2s2
    8/13/14 3:00:53.000 PM kernel[0]: hfs: unmount initiated on iTunes on device disk1s2
    Step 2
    Process:         iTunes [5921]
    Path:            /Applications/iTunes.app/Contents/MacOS/iTunes
    Identifier:      com.apple.iTunes
    Build Info:      iTunes-1122011002002003~1
    Responsible:     iTunes [5921]
    Thread 0:: iTunes main  Dispatch queue: com.apple.main-thread
    2   com.apple.iTunes               0x0000000102ae9f1b 0x102ae5000 + 20251
    3   com.apple.iTunes               0x0000000102ae9e75 0x102ae5000 + 20085
    4   com.apple.iTunes               0x0000000102c8ba42 0x102ae5000 + 1731138
    5   com.apple.iTunes               0x0000000102c7a9ec 0x102ae5000 + 1661420
    6   com.apple.iTunes               0x0000000102c79b6e 0x102ae5000 + 1657710
    7   com.apple.iTunes               0x0000000102c41de2 0x102ae5000 + 1428962
    8   com.apple.iTunes               0x0000000102c41d72 0x102ae5000 + 1428850
    25  com.apple.iTunes               0x0000000103421ad0 0x102ae5000 + 9685712
    26  com.apple.iTunes               0x0000000102e617e0 0x102ae5000 + 3655648
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    6   com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    2   com.apple.iTunes               0x0000000102ae9f1b 0x102ae5000 + 20251
    3   com.apple.iTunes               0x0000000102ae9e75 0x102ae5000 + 20085
    4   com.apple.iTunes               0x0000000102b7c848 0x102ae5000 + 620616
    5   com.apple.iTunes               0x0000000102bdc07b 0x102ae5000 + 1011835
    6   com.apple.iTunes               0x00000001031b2b4e 0x102ae5000 + 7134030
    7   com.apple.iTunes               0x0000000102bdb665 0x102ae5000 + 1009253
    8   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    2   com.apple.iTunes               0x0000000102ae9f1b 0x102ae5000 + 20251
    3   com.apple.iTunes               0x0000000102ae9e75 0x102ae5000 + 20085
    4   com.apple.iTunes               0x0000000103152232 0x102ae5000 + 6738482
    5   com.apple.iTunes               0x0000000102bdca4e 0x102ae5000 + 1014350
    6   com.apple.iTunes               0x0000000102bdc3ec 0x102ae5000 + 1012716
    12  com.apple.iTunes               0x0000000102b00cab 0x102ae5000 + 113835
    13  com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    1   com.apple.iTunes               0x000000010379d108 0x102ae5000 + 13336840
    2   com.apple.iTunes               0x000000010377f742 0x102ae5000 + 13215554
    3   com.apple.iTunes               0x0000000103792889 0x102ae5000 + 13293705
    4   com.apple.iTunes               0x0000000103792575 0x102ae5000 + 13292917
    5   com.apple.iTunes               0x0000000102b63d9e 0x102ae5000 + 519582
    6   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    1   com.apple.iTunes               0x000000010379d108 0x102ae5000 + 13336840
    2   com.apple.iTunes               0x000000010377f742 0x102ae5000 + 13215554
    3   com.apple.iTunes               0x0000000103792889 0x102ae5000 + 13293705
    4   com.apple.iTunes               0x0000000103792575 0x102ae5000 + 13292917
    5   com.apple.iTunes               0x0000000102b63d9e 0x102ae5000 + 519582
    6   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
    5   com.apple.iTunes               0x00000001034f994a 0x102ae5000 + 10570058
    6   com.apple.iTunes               0x0000000102b63d9e 0x102ae5000 + 519582
    7   com.apple.iTunes               0x0000000102aeac02 0x102ae5000 + 23554
           0x102ae5000 -        0x10423ffef  com.apple.iTunes (11.2.2 - 11.2.2) <E7A40F98-7562-3CA6-9575-16553270FB97> /Applications/iTunes.app/Contents/MacOS/iTunes
           0x10462d000 -        0x1046adff7  com.apple.iTunes.iPodUpdater (10.7 - 10.7) <346D1F7E-A1E7-3A53-9DEF-3D22885079C8> /Applications/iTunes.app/Contents/Frameworks/iPodUpdater.framework/Versions/A/i PodUpdater
           0x104799000 -        0x104ad6fef  com.apple.iad.iAdCore (1.0 - 1) <DEC4133E-928D-38FF-8207-F9BC3D79A372> /Applications/iTunes.app/Contents/Frameworks/iAdCore.framework/Versions/A/iAdCo re
           0x104bc8000 -        0x104ef4ff7 +libgnsdk_dsp.1.9.5.dylib (1.9.5) <14636B08-4D26-54CA-3EE8-247B2B708AF0> /Applications/iTunes.app/Contents/MacOS/libgnsdk_dsp.1.9.5.dylib
           0x104f26000 -        0x104f5dff7 +libgnsdk_musicid.1.9.5.dylib (1.9.5) <C034C2ED-6A46-315F-89C8-8D54A937B255> /Applications/iTunes.app/Contents/MacOS/libgnsdk_musicid.1.9.5.dylib
           0x104f79000 -        0x10504ffe7 +libgnsdk_sdkmanager.1.9.5.dylib (1.9.5) <D144E870-FABC-E19E-452E-A33D19595B19> /Applications/iTunes.app/Contents/MacOS/libgnsdk_sdkmanager.1.9.5.dylib
           0x105074000 -        0x1050b7ff7 +libgnsdk_submit.1.9.5.dylib (1.9.5) <6689251D-098B-0F8D-08CC-785271E98540> /Applications/iTunes.app/Contents/MacOS/libgnsdk_submit.1.9.5.dylib
           0x1096ac000 -        0x1096afff7  com.apple.QuartzComposer.iTunesPlugIn (1.4 - 18) <08330444-D369-3B4F-AE16-8E48F771CEEB> /Library/iTunes/iTunes Plug-ins/Quartz Composer Visualizer.bundle/Contents/MacOS/Quartz Composer Visualizer
    Thanks for any help that may be offered, it is much appreciated.
    B

  • My iPhone 5 iOS 7.0.4 still gets hot and drains battery with everything but cellular turned off.  What to do?

    Have a new iPhone bought in late July 2013.  It had zero heating issues and battery issues until the past week (Nov. 2013).  Now, the iPhone gets hot to the touch and the battery drains within 2 to 3 hours, EVEN AFTER I HAVE DISABLED ALMOST EVERY FEATURE OF THE iPHONE.
    This iPhone has iOS 7.0.4, installed within last 36 hours.  I then erased the entire iPhone and restarted it as a New iPhone.  Then I went in and turned off everything in the way of Settings that permit disabling.  All notifications, spotlight searches, application updating, accessibility features, push features, location services, etc. were turned off or disabled.  Brightness is set to Auto.  Don't use the iCloud. 
    After doing all of that, which essentially rendered this iPhone just a clunky old cell phone, not even using WiFi, I connected to iTunes on my computer and restored my backed up apps, photos. 
    After the Restore, I went back into settings and made certain that, again, all notifications, app services, location services, updatings, etc. were disabled, still.
    The problem persists.
    It seems the only solution is to get rid of all my Apps and never use WiFi, or iCloud, or Mail.  That is unacceptable.
    Does anyone have a solution, besides my calling on the warranty on this phone?

    Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved. 
    If the problem continues, take the device to Apple for evaluation and possible replacement.

  • IPhone 4S (iOS 7.1) - iCloud Contacts/Calendars dissappearing

    Hey guys,
    I was wondering if you guys had this same problem. I searched around Google and in this community, and it seems like you guys also do. I'm going to create a new thread with more details below..
    Basic Info:
    iPhone 4S (Chinse (CN) phone)
    iOS 7.1
    I'm an American working in Shanghai, China.
    Issue:
    At random times and at least 3 times a month, my contacts and calendar events would dissappear.
    When it disappears, ...
    I see only phone numbers in the Phone application and when someone calls me.
    My Contacts app only list like 5 out of my 230+ contacts, I dont' know why only these 5 were not affected. This is my iCloud contacts.
    My Calendar is empty and no longer shows which Calendar I can hide or show. I had 3 different calendars (iCloud, Personal, and Work calendars)
    After about 2 hours (or even longer), the Contacts and Calendars will slowly return as it tries to download from the iCloud server (I can see the loading animation in Calendar and the contacts slowly showing up). Sometimes it doesn't return after 2 hours and I have to manually force it by turning OFF and ON the calendars sync.
    Already tried:
    Restarting the phone (soft shutdown and hard shutdown by Home + Power)
    Already checked to make sure iCloud, Contacts, and Calendars is ON in Settings
    Already tried turning them OFF, wait about 10 minutes, then turn it back on. Sometimes it loads back the data, sometimes it doesn't. Right now, I have my work calendar missing.
    This bug happens seem to happen only when I'm on Wi-fi. Didn't see it happen on 3G yet. Not sure, but it seems to happen when I switch from 3G to Wifi automatically when I got home. Need to confirm this.
    Tried syncing to iCloud to see if it comes back, 1/3 of the time it would.
    History w/ this bug:
    I had this phone since iOS 6.
    This bug first appeared in iOS 7, which also happened at least 3 times a month. I reported this directly to Apple Support, but not sure if they read it.
    In iOS 7.0.x, this bug stopped reappearing. Seems like they heard us and fixed it. I never had this issue again.
    In iOS 7.1, this bug resurfaced and now is haunting me again.
    Other cases?
    My iPad 3 iOS 7.1 is from Hong Kong, doesn't have this bug and I use the same Wi-fi connection as my iPhone.
    My girlfriend has an iPhone 5 iOS 7.1 (US) and iPad mini 2 (CN), she didn't experience this issue.
    My colleagues has Chinese phones just like mine (iPhone 4S w/ iOS 7.0 and iOS 7.1), didn't have the issue.
    Searching in Google and this community, it seems people are expering the same issue.
    I am doubting that this bug has anything to do with my hardware or my settings. I feel this is a iOS software issue. Please let me know what I can do to help as I've already tried everything I can think of.
    Thanks,
    Bruce

    Within Contacts, tap Groups at top left. Make sure all contact groups are checked to show, then tap "Done" at top right.
    Within the Calendar app, tap Calendars at the bottom center of the screen. Tap on Show All Calendars.

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    Howdy there COUGAR444,
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    How to erase your iOS device and then set it up as a new device or restore it from backups
    If it does, then restore your backup to either verify it still works and the software just needed reinstalled, or isolate the issue to the backup file itself. 
    Thank you for using Apple Support Communities.
    Regards,
    Sterling

  • IPhone 3GS (iOS 5) will not sync, stuck on *backing up* in iTunes 10.6.3.25

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    Chrissi
    Windows 7 Home Premium, iPhone 3GS (iOS 5.1.1) and iTunes 10.6.3.25
    I am also having this problem: https://discussions.apple.com/thread/4076906?tstart=0 Could they be related?
    Message was edited by: ChrissiMoon

    Close your iTunes,
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    http://support.apple.com/kb/TS4123?viewlocale=en_US

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  • IPhone 4S/iOS 7.0.4/WiFi Grey Out Issues

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  • Hello, so today I realized that my iPhone with iOS 6 is frozen on the music. I can get back to the home screen but I can't get the music player to work because its frozen on the w's and will not respond to touch. I would be grateful for any help on this.

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    Hi deamayfield,
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    http://support.apple.com/kb/ht1430
    Best,
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  • HT4314 iPhone 5c iOS 8.0.2 Game Center randomly logged me out and asked for a nickname as if I did not have an account. How do I get my account back?

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