1. Description
The Kleos application allows you to call the contacts of the database on the mobile phone. In order to enable this feature, the client must authorize KLEOS from the permissions for third-party applications on the mobile phone.

2. Solution
Go to the mobile settings  


NOTE: depending on the mobile model/brand the names of the options may be different.

Select Apps & notifications









Search for Kleos in the list and enable the option.