10-20-2011 9:27 PM
When you connect your phone to your computer and open iTunes, you will see a summary page with various tabs across the top. Click Info, and you can uncheck any items you do not want to sync, such as contacts, bookmarks, etc. If you want to get rid of the duplicate contacts, do a Google search for "duplicate contacts when syncing" or a similar phrase of your choice, and you will find a multitude of help, depending on whether you are using a service such as MobileMe and on what sources you might be syncing contacts from. I hope this isn't too general to help--if you need more information, just post back with any additional questions and I'm sure you'll get more answers.
03-30-2012 5:40 AM
I have the same problem with the calendar. On Outlook, I have added in birthdays and anniversaries. On my phone is where I add all the other events that happen. After syncing for a couple years, I now have 5 calendars on my phone. Birthdays will be listed 3 times and on multiple days.
I have tried only showing one or two calendars, but then for some reason, there are items that do not appear.
How do I "clean" this up???
04-10-2012 9:32 AM
Here's a great thread from Apple's forum about this very topic (both calendar and contacts): https://discussions.apple.com/thread/2241007
Here's the solution that worked for them:
This means you've also selected to sync contacts and calendars direct with the Address Book and iCal on your Mac via the iTunes sync process. This isn't required when syncing contacts and calendars over the air with a MobileMe account and only duplicates contacts and calendars on your iPhone.
First deselect sync contacts and calendars under the Info tab for your iPhone sync preferences followed by selecting Apply.
On your iPhone, go to Settings > Mail, Contacts, Calendars.
Turn Contacts and Calendars off for over the air syncing with your MobileMe account. This will delete all contacts and calendars downloaded from and being kept synchronized with your MobileMe online address book and calendars with a warning message provided indicating this will occur. This will not delete the contacts and calendars synced direct with the Address Book and iCal on your Mac via the iTunes sync process.
Select OK and wait a few minutes for all online contacts and calendar events to be erased from your iPhone.
Follow this by turning Contacts and Calendars back on for over the air syncing with your MobileMe account on your iPhone. A merge prompt will be provided when doing so, which you want to select.
This will remove the duplicates.