Mad about Computer: How to Remove Duplicate Contacts From Your Android Device

First of all you need to download and install a cool app that help you in this job that is Simpler Merge Duplicates.
Now launch the app in your android device and then this app will start scanning all the contacts in your android device.
Now you will see all the contacts that have their duplicate copies in your device.
Just click on merge option and all the contacts with similar details and name will get removed from your device and only the unique copies of every contact will remain there.
That's it you are done, your all duplicate contacts with multiple copies gets removed or merged together and you will now see only unique contacts in your device.