While on the Caller side, by default you should see the entire call history for a contact shown at the bottom of the page. If you do not see all or any of the call history, this may be because of a project setting that your Admin has configured. In order to make necessary changes, you will need to have Admin access and follow the steps listed in our Hide Call History article. 

This setting is project-specific so you may have the ability to see the call history for one contact but not another depending which project you're in.