How can I change the default picture of the contacts? As you can see, when I call someone who doesn't have a unique picture, the default picture of the contacts looks like this:



And I want to see something different or less pixelated for instance.
Is there anyway to change that picture to something else?

*note: I have a rooted phone.
There is no easy way to do that. At least not easily as one needs to root and modify and/or replace phone.apk and contacts.apk with a different resource file with "unknown" icon.

Easier alternatives can be alternative dialers. You can find them in Google Play.

Hope this helps.