Duplicate Contacts on Marshmallow 6.0 I am using Android 6.0 on C5302 Xperia SP. For some unknown reason, all the contacts in my phone show up twice with a few exceptions. I tried to manually delete the duplicates but that resulted in both the duplicate and the original one getting deleted. I tried out many apps from the play store to merge or delete duplicate contacts but no duplicates were found. Can someone help me out on this.

Under contacts to display option, I just have my google account selected.
I just figured this out accidentally.


Go to contacts to display option
Select customise option (spanner icon)
Under your google account, select only my contacts and uncheck other options. Repeat this for other accounts that show duplicates.