The function DIAL|IT- Call last contact, can be reached via the view with this icon :

 

 

 

However, you can also find this function under the following steps:

 

1. click on contact or company detail view.

 

 

 

2. After that, click on Tools and then on the CRMADDON Factory Addons menu.

 

 

 

3. select Dial|IT-Last contact here.

 

 

If you have just edited a contact when a call came from another contact, this function will take you back to the previous contact.