For this function to work correctly, it is necessary to have a correctly set mobile phone. First, check that you have the current version of the application installed, then go to the "Settings" section via the "three dots" in the lower navigation and check the active status of the "Incoming call identification" switch - it must be activated by pressing it.
Due to the different settings, it is necessary to perform the steps differently according to the platform:
For proper operation on your platform, you must install the official "Phone by Google" application, which can be found in the Play Store mobile application (see image below).
If you already have the application installed and use it as the default, there is no need to continue with the next steps - the personalization of incoming calls should work for you.
When enabled, you should be redirected to the settings, where you select the item "Call blocking and identification". In this section, it is necessary to activate the switch for the Recruitis application. The desired state is shown in the figure below.