You can customize the default incoming call sounds with your preferred tunes.
Here's how to set call ringtones on Mobiistar Zoro 4G:
Step 1: Go to 'Settings' and select 'Sounds'.

Access 'Settings' and choose 'Sounds'.
Step 2: Select 'Phone Ringtones'.

Select 'Phone Ringtones'.
Step 3: Choose a ringtone for SIM 1.

Choose a ringtone for SIM 1.
Step 4: Choose a ringtone for SIM 2.

Choose a ringtone for SIM 2.
That completes your setup process. Wishing you success!
