Unfortunately phone has stopped error on samsung galaxy note 3

[twratley1]

Why am I getting the error message unfortunately phone has stopped only when in any apps?

 

[jasonandrews25788]

clear the cache and data of the phone app.

 

[twratley1]

clear the cache and data of the phone app.

I don't know how to do that??

 

[twratley1]

I went into reboot and cleared the cache but it is still showing error during phone calls??