Your BlackBerry device automatically merges contacts when it's clear that those contacts are the same person (for example, they share the same first and last name, mobile phone number, BlackBerry ID, and so on). If you still see duplicate entries in your contact list, you can merge those contacts into one entry.
If you added a social networking account to your BlackBerry device and you're using a profile picture as a contact's picture, then the picture changes when your contact changes his or her profile picture.
If you imported contact entries using BlackBerry Link, you might see duplicate entries on your device after syncing your device and computer.
You can remove duplicates by merging contacts on your device, or by clearing your local data on your device.
To remove duplicate contact entries by deleting your local device data, do the following: