Iphone 4s keeps deleting contacts and calendar events

I've had my phone for about 4 months now, and twice within this short time my phone has randomly been fine and then I'll text someone and the next thing I know all my contacts are gone as well as everything put into my calendar. What can I do? I have stuff backed up on iCloud, and I noticed the first time this happened my contact photos eventually came back within a week, but I still had to program all my contacts again so I'd have them. Anyone have any suggestions or know why this might be happening?

Nope, and this isn't the first problem I've been having with this phone. For months now I've been unable to use itunes on my computer to sync with my phone because it keeps coming up as not being able to read it and asking me to reset my phone to factory.

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How do i change an apple id on an iphone 4 but keep my contacts and calendars in the process?

Hi ive had 2 iphone 4's under the same apple id for the past yr. One phone is my fathers and the other phone is mine. I want to create an apple id for my dad and change his apple id on his iphone but keep his contacts and calendars. Can that be done and how do i do it?

Run iTunes, and you can select all the music that is on there and delete it if you wish. Then deauthorize the computer from your account if she won't be playing any of the music you bought on your account (this can be done under the store tab). Then have her sign out of your account on iTunes and then sign into hers. Also have her authorize the computer for her account.

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- I switched from the iPhone 4 to the iPhone 5s and did the easy option of having it automatically set up like my previous phone, so I did not change any part of the setup. It is possible that it stopped syncing at that time, based on which contacts have synced and which haven't.
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Is there a difference between the gmail account I set up and what the Contacts app calls GMAIL?
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Hello Marsden,
Try this...
Go to the isync program on your Mac.
Go to Preferences in the main menu
Hit Reset Sync History
I'm pretty sure this is how I fixed it... so far so good.
Let me know if that works for you!

Why can´t I see contacts and calendar events from my iPhone in my mac pro if I already registered it in the cloud?

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Assuming you activated iCloud, try going to Settings>iCloud and make sure Calendars and Contacts are set to ON.

I have 3 i phones. Can I have multiple accounts on one computer where it keeps the contacta and calendar for each?

I have 3 i phones. Can I have multiple accounts on one computer where it keeps the contacta and calendar for each?

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Might you have 200 entries in On My Mac groups and some of your appointments in On My Mac calendars?

Many contacts and calendar events have disappeared

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HT1296 When syncing to ipod and ipad i get duplicate contacts and calendar events

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I've lost the contacts and calendar events from my 3GS after setting up iCloud with iPad3 and PC Outlook. Any solutions?

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From
http://btsc.webapps.blackberry.com/btsc/viewdocument.do;jsessionid=B786F9DEB73FE BE22A4D2F911A97BC3C?externalId=KB35311&sliceId=2&cmd=displayKC&docType=kc&noCoun t=true&ViewedDocsListHelper=com.kanisa.apps.common.BaseViewedDocsListHelperImpl
BlackBerry Desktop Software utilizes Apple's SyncServices technology in order to synchronize Contact, Calendar, Notes, and Tasks information to and from the Mac computer.
BlackBerry Desktop Software synchronizes information with the SyncServices database, which is synchronized with the desktop applications on the Mac computer (for example: Apple Address Book, iCal, Apple Mail, Microsoft Outlook for Mac). BlackBerry Desktop Software does not synchronize directly to or from the desktop applications on the Mac computer.
Mac OS X Mavericks v10.9 and later does not use SyncServices, therefore, it is not possible to synchronize Contact or Calendar information using the BlackBerry Desktop Software on these versions of OS X.
For more information on SyncServices and OS X Mavericks, see the following Apple Support article:
http://support.apple.com/kb/HT5847
Note: BlackBerry Desktop software 2.4 is still supported for use with Mac OS X v10.6, 10.7, and 10.8.
Pete

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Any update or response from an Apple employee/technician for this problem?
I too have had everything wiped off my phone when updating to iOS 6. Never had this problem before and was not clearly informed that the phone may get wiped (sure, there was an essay to read but, like most people, just clicked confirm). Every other update I've had has gone smoothly without a problem so presumed this would be the same.
Why was there not a clear warning stated before going ahead with the upgrade that your phone may get wiped and you will need to back it up just incase?
Not a happy customer!
NB was able to get my contacts back only via iCloud.

How to delete all contacts and calendar events?

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Delete an account from iPod touch: Choose “Settings > Mail, Contacts, Calendars,” choose an account, then scroll down and tap Delete Account.
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I'm having the same issue. Upgraded my 3G to OS4 which wiped out my contacts from the phone. I also use CompanionLink (Express) to sync ATC with Outlook and iTunes and the phone. Have spent hours/days on the phone with second level Apple tech support to no avail. CompanionLink IS syncing with Outlook but Outlook isn't syncing with the phone. Have tried syncing to Outlook directly (without CompanionLink) but no good result. Tried syncing through MobilMe. Can sync all Outlook contacts from my computer to me.com through MobileMe but does not sync with the phone. Tech support suggested trying to sync fewer contacts at a time as their might be a problem with the contacts file. DID manage to get 4000 of my 5600 contacts back in but can't get any more in. Previously had NO problem syncin all contacts directly and through CompanionLink. VERY frustrating.
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Contacts and calendar events disappearing and reappearing

I have three issues, two of which I think are related.
1.
My contacts disappear on my iPhone 3G. I am set up with MobileMe to auto sync and I don't know if that is getting screwed up somehow? The contact are on my Mac lap top when I go look (thank goodness), and I force a sync and they transfer to my phone fine. This has happened twice now. I have copied my contacts as vCards and saved that file in the downloads folder just in case they get lost on both my laptop and my iPhone - I also do a regular full laptop backup to my Time Machine - is there anything else I should be doing to back up my contact and calendar data?
2. (possibly related to 1.)
When I am looking at my iCal in the weekly view on my laptop, sometimes several of my appointments are not visible. It is only when I try to put an appointment in that is at the same time as the invisible ones that they suddenly reappear.
3. One of my contacts will not sync from my iPhone to my lap top? It used to be in both places but for some reason it is now only on my iPhone and even when I sync, it doesn't come into my laptop Address Book.
Help please!!!

i am having what i think is a very similar problem in that my Exchange (you seem to use only mobileme) contacts partially disappear. i discover this when i check my sms message list and find that many messages show only the phone number when earlier the name was there. a check of the contacts list shows that some have disappeared.
i restarted the phone and checked immediately but it was still gone but after a few minutes they came back.
my theory is that something is going on with messy exchange server syncs with my iphone that could be causing the process to break midway but after a while the phone automatically syncs again.
this issue appears quite rarely for me but enough to be noticed and to be annoying.

Iphone 4s keeps deleting contacts and calendar events

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