For some unkown reason I have many duplicate contacts in my Google account. More than 18.000 duplicates. This causes big problem on Android devices.
I have tried several suggestions which I found in forums. Such as https://productforums.google.com/forum/#!topic/gmail/WIUTlfWCe98 .
I made "Find duplicates" and then "Merged", but it didn't help.
I also tried using special android apps for duplicate contact deletion, but it didn't help either, as contact was reapearing from my google account.
Finally I realized I have one particular contact repeating for thousands times. I tried deleting it in https://contacts.google.com/preview/all, but it didn't help. Strangely contact is reapearing after deletion.
Any help?
Best Answer
Finally I found the solution which works for me!
Go to your Google contact page https://contacts.google.com/preview/all.
Press "More" and then "Export".
Press "Go to Old Contacts".
You will find old interface Google Contacts and there you will be able to review your "Other Contacts".
I found all duplicates are inside "Other Contacts". Now we need to delete 18.000 duplicates.
In order to quickly delete I pressed "Settings" and then selected 250 items to display per page.
I used "Select All" and then "More" & "Delete". In around 15 minutes I managed to delete all duplicates (in batches of 250).
Finally I deleted all Android Contact using this solution: Droidiser: How to delete all contacts at once from any Android device and then synced Contact to the latest Google Contact status. Finally after so long time my contacts are fixed!