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About duplicate contacts and calendars on iPhone 3.0 iOS devices
When I synced my iPhone after the iPhone 3.0 OS upgrade, I wound up with double contacts and calendar entries. Checking every Mac in the house, as well as MobileMe, though, revealed no duplicate entries. They were only on the iPhone. As I dug into the problem on the iPhone, I discovered that these weren't actually true duplicates (i.e. the same event is entered twice on the same calendar), but rather I had two distinct groups of calendars and contacts.

In both apps, when I tapped the Groups button, I saw that there were two groups in each app: On my iPhone and MobileMe Account (or something like that, indicating my MobileMe account). I then started digging around in both the MobileMe and iTunes sync settings. As it turned out, I had the phone set to sync via both iTunes and MobileMe. I've had it set like this forever, but it seems iPhone 3.0 allows you to have both sync types active at once. When you do, you get a group for each.

Once I figured out what was going on, I disabled the Mac sync and left MobilMe sync active. However, I still had two groups on the iPhone, which I didn't want. I tried the obvious solutions to remove the duplicates. I tried syncing via only MobileMe, then only via iTunes, but neither got rid of the duplicate groups. I even tried the "Replace information on this iPhone" options in iTunes, but still had the two group problem.

Finally, I found a brute force solution that seems to have worked. On the iPhone, I deleted my MobileMe account, and then set it up again. When I then turned on MobileMe syncing for calendars and contacts, the iPhone told me there were existing records, and did I want to merge them with these newly-synced records. I said yes for both contacts and calendars, and that was the end of the duplicates!

After all that, I've actually enabled iTunes sync again -- but only for those subscribed calendars that MobileMe sync isn't able to handle. I believe this was the intent of the change in 3.0, and it's a good one ... it just caught me off guard at first, due to my redundant settings.
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About duplicate contacts and calendars on iPhone 3.0 | 30 comments | Create New Account
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About duplicate contacts and calendars on iPhone 3.0
Authored by: Unsoluble on Jun 18, '09 08:40:58AM

Oh cool, can we have our iCal-subscribed calendars show up on our phone now? Been waiting for that since the beginning... must try when I get home. :)



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About duplicate contacts and calendars on iPhone 3.0
Authored by: sven on Jun 18, '09 08:53:37AM

I had the same problem but instead of deleting the mobile me account I created a dummy entry in address book which I put in a dummy group. That allows you to sync only that group to your phone and afterwards you simply delete the contact and the group on the phone. Note that you can't delete contact groups with the default contacts app on the iPhone but I've got the "Groups" app which can.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: jrad2u on Jun 18, '09 10:02:15AM

Yeah, the problem exists with Google Contacts too. It seems to be that you can't sync to your Mac and some other service without selecting some group from the Mac. I created a 'dummy' group with no records and then selected that to sync. Next sync I'm back to my original set of contacts, no duplicates.

There should be a better way though.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: pathkids on Feb 28, '10 04:47:15PM

have you worked out a better way for google contacts? I only seem to have the duplicate issue with contacts not calendar entries for some reason



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About duplicate contacts and calendars on iPhone 3.0
Authored by: joshforman on Jun 18, '09 02:13:13PM

Yes, you can either enable that in iTunes as described, or email yourself links to the calendars (they must begin with webcal://). Click on them in the iphone mail app and you'll be able to subcribe to them on the phone.

---
Josh Forman

http://www.jofo.com/



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About duplicate contacts and calendars on iPhone 3.0
Authored by: Nightlife on Jun 18, '09 09:59:47AM

For contacts, Sven's tip worked for me, and is a little easier:

Turn off MobileMe Contacts Sync on the iPhone and remove all contacts from the phone when it asks
On your Mac, create a dummy group, add one dummy entry
Turn on "Sync Selected Contacts," and only pick the dummy group
Sync your iPhone. When you're done, you should only have one group, and one contact.
Turn off Contacts syncing in iTunes.
Re-activate MobileMe syncing on your iPhone, and pick "Merge" when it asks what you want to do with the contacts on MobileMe. Let it sync over the air and add back all of your contacts.
Now delete your dummy group and contact on your Mac.
Let your iPhone sync over the air, and viola, back to normal. PHEW!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: ASFx on Jun 18, '09 12:28:20PM

I think the way I did it was easiest.

-Turn off mobileme push on my phone
-Go into itunes and turn on "replace information on this iphone"
-sync once, and it will put a fresh copy of your calendar and address book on your phone
-go back into itunes, turn off syncing to address book and calendars
-on your phone, turn mobileme push back on, and when it asks you if you want to merge, say NO

That's it.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: grapegraphics on Jun 18, '09 01:57:29PM

iPhone settings (Settings/Mail, Contacts, Calendars/MobileMe)

- turn OFF "Contacts," wait and then select DELETE from my iPhone.
- Turn ON "Contacts," wait and then select MERGE

- turn OFF "Calendars," wait and then select DELETE from my iPhone.
- Turn ON "Calendars," wait and then select MERGE

Seemed to work for me

Jb



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About duplicate contacts and calendars on iPhone 3.0
Authored by: whoadoggy on Jun 18, '09 07:43:22PM

perfect worked for me! Thanks.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: iphoneonpc on Jun 25, '09 06:48:40AM

Note for non Mac, non mobileme userers a similar solution works. e.g. if using MS Outlook and Exchange synch over the air. You can remove the duplicates caused by synching with PC by:
- go into settings/mail contacts calendars
- select active exchange account
- turn off 'contacts' - when prompted, delete
- after deleted turn on contacts and when prompted, delete from iphone
- repeate same process for calendar



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About duplicate contacts and calendars on iPhone 3.0
Authored by: AKMacAddict on Jan 02, '10 12:09:02PM

I've been really struggling with this issue. It even followed me after a restore of 3.1.2. (Which makes sense; coming from a backup and not setting up as a new phone.)

However, this simple tip cleaned things up in just a few easy steps and a couple of minutes. Thanks!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: ffloydsky on Aug 29, '09 12:17:32PM

THANK YOU, THANK YOU, THANK YOU! This has been driving me nuts for the last two days and I couldn't find a solution that worked! This was the easiest solution I have seen yet and worked flawlessly for me!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: mcmikemn on Nov 09, '09 10:36:39AM

This worked for me, too, and was very simple. Thanks.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: jimhoyt on Jun 19, '09 05:36:34PM
When all else fails, and it did for me, try resetting the SyncServices folder. Backup first.

Mac OS X 10.5: Resetting the SyncServices folder
[link:]http://support.apple.com/kb/TS1627?viewlocale=en_US

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About duplicate contacts and calendars on iPhone 3.0
Authored by: Ernie Cooley on Jun 22, '09 04:28:47AM

I'm having problems with this too.

Have tried a number of the options above with mixed results.

If I turn off, and Delete and then turn on and Merge Calendars, I lose the subscribed Calendars that are normally on my iPhone & MAC.

The only way I can then get them back is to re-sync using i Tunes which then creates duplicate calendars (I.E. Calendars on MobileMe and Calendars on My Mac) so I am back to Square one again.

When stopping the Push Calendars and overwriting data on the MAC to the iPhone it creates duplicates again.

Has anyone got this to work, I need to sync (Including subscribed Caledars) over air and only have one list of Calendars in my iPhone.

Can anyone provide a step by step solution.

Thanks in advance



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About duplicate contacts and calendars on iPhone 3.0
Authored by: T_Slothrop on Jun 24, '09 07:44:22AM
Actually, there is a really simple way to fix this, and it was the original hint that made me realize this. In that hint, robg says: "After all that, I've actually enabled iTunes sync again -- but only for those subscribed calendars that MobileMe sync isn't able to handle. I believe this was the intent of the change in 3.0, and it's a good one ... it just caught me off guard at first, due to my redundant settings." The solution is to simply go to the "Info" pane in iTunes for your iPhone and:
  1. In the "Calendars" section, have iTunes only sync "Selected Calendars", and only select those that will not be synced via MobileMe (e.g., subscribed calendars). If All are to be synced via MobileMe, uncheck "Sync iCal Calendars"
  2. In the "Advanced" section, select "Calendars" below "Replace information on this iPhone"
  3. Click on "Apply" and the iPhone will resync
At this point, at least for me, all of the duplicates were removed.

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About duplicate contacts and calendars on iPhone 3.0
Authored by: magiclaffs on Aug 28, '09 04:01:06PM

I've had this problem ever since I had to turn in my 2nd Iphone for sound problems. When I synched- I got 3 sets of duplicate contacts: 1 on the PC, one on Mobile Me, one on "All Groups". Pain in the rear. I searched and searched and this was exactly what i needed. This works perfectly.



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Easy Fix
Authored by: JoshMurphy on Dec 02, '09 03:49:56PM

I found an easier way just stop syncing in itunes
turn off contacts on mobileme
go to contacts and the group all contacts and create a new contact under that group exit out go back to mobile me settings and sync contacts and click delete contacts



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About duplicate contacts and calendars on iPhone 3.0
Authored by: dmbream on Dec 03, '09 06:50:44PM

The above solutions didn't do it for me.

THIS DID:

Managing/Deleting calendars from the MobileMe browser-based calendar.

Go to:

http://www.me.com/calendar/

All of your calendars will be listed along the left side of the page, including any duplicates.

Click on the name of each duplicate calendar.

Then, from under the Action (gear icon) menu in the header bar, select 'Delete.' Confirm when the warning pops up.

I don't know how those duplicates got on my cloud. They did not appear on my Mac, but they were there on my iPhone and the browser-based calendar. This fixed it for me.

Phew. This was annoying the crap out of me.

BONUS:

Despite having MobileMe set to sync once per day in System Prefs, it would still sync every 15 minutes (and, I don't know about you, but MobileMe syncs bring my system to a craw)l. I couldn't for the life of me figure out why. Assumed a corrupt preference file, a bug, etc. I logged out of my account from within System Prefs and back in. I wiped my data and pulled it down from the cloud. Nothing.

THEN:

In iCal, select 'Get Info' on any subscribed calendars. In the resulting window, adjust the Auto-refresh interval to your desired time. One or two calendars were set to sync every 15 minutes. This setting, apparently, overrides whatever global setting you enter for MobileMe in System Prefs.

Problem solved.

A twofer!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: ChrisSmithWebGuy on Feb 14, '11 05:15:34PM

I've been using this Mac outlook 2011 and encountered lot of problems. Outlook does not sync all of my contacts and calendars with iCal. This deal breaker for me. My Gmail contacts were duplicated when I have it synced.I have hundreds even thousand of contacts duplicated. But still I'm very thankful, I have found Scrubly. I truly appreciate an accurate address book each time I go to look up a contact.I have read also their blog on How to sync properly for Mac. Hope this will also help who will encounter the same problem. =)



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About duplicate contacts and calendars on iPhone 3.0
Authored by: lgerns on Jan 11, '10 11:00:46AM

This worked like a charm! Thank you.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: GirlieGeek on Jan 16, '10 08:44:45AM

Thank goodness for that. The duplicate calendars and contacts were doing my head in. Thanks so much for this - it worked like a absolute treat with sugar on top!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: lzboy on Feb 05, '10 06:44:18PM

This app removes duplicates for me, you might check it out.

[Link:] http://itunes.apple.com/us/app/remove-duplicate-contacts/id312352867?mt=8



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About duplicate contacts and calendars on iPhone 3.0
Authored by: jlbrown on Jun 08, '10 08:54:51PM

Fantastic. This app worked perfectly. No more duplicated contacts on my phone.

Thanks for the link.

James.



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About duplicate contacts and calendars on iPhone 3.0
Authored by: AAABBB on Feb 13, '10 08:11:12PM

Easiest fastest safest way is:

You turn off and then back on the contacts switch on the MobileMe settings. It will ask you if you want to delete them. Say no, then turn back on. The choose "merge" when prompted Voila! Only those on Mobileme will be reposed.

If you want to play extra safe, back up on iTunes first. I played with mine, even choosing deleting the contacts from the iPhone and worked flawlessly every time (five times)

Good luck!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: zzyxxyzz on Apr 11, '10 11:55:21PM

excellent tip. this solution solved my problem perfectly... the duplicates were really starting to bug me. thx!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: Garret Byrne on Aug 30, '10 07:11:48AM

That did it for me.. Cheers mate



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About duplicate contacts and calendars on iPhone 3.0
Authored by: aslo on Dec 15, '10 10:12:11AM

This is incredible. Do you know how many HOURS I have spent online with Apple support people who COULD NOT help me with this...!!! Thank you so much for posting this!!!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: JUllaja on May 18, '11 06:35:20AM

Perfect!!!! To resolve duplicates trouble I've purchased "DUPLICATE REMOVER" tool---- it is a pitty I haven't read this earlier... could save 2.99 ;) Anyway -THANKS for perfect advise!!!



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About duplicate contacts and calendars on iPhone 3.0
Authored by: ThirtyOne on Dec 06, '11 06:10:21AM

Thanks for the info. I bought an app called Merge Duplicate Contacts that works for me. If I had seen this sooner I might have saved some money!



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