Have you ever wonder, when you click on "Phone", it shows the history of call made, received, missed call.

I have the following questions
1. How long does the history goes back, 30 days?

2. Where does the history being stored? SD card or Phone - I used my phone for business and I have an enormous list of calls made, received and so on...would that affect the speed of the phone and storage as well?

3. Is there a way we could limit the setting of the history to past week only? or can we set it up to store the history in the SD Card?

Thanks for your help