To add a contact to your favorites in Fast Call, open the app and navigate to your contacts list. Find the desired contact, then tap the star icon next to their name to mark them as a favorite.

Yes, you can customize speed dial settings in Fast Call. Go to the settings menu, select 'Speed Dial,' and then assign contacts to specific number keys for quick access.

To change the ringtone for a specific contact, open the contact details in Fast Call, select 'Edit,' and then look for the 'Ringtone' option. Choose your preferred ringtone and save the changes.

To delete a contact from your favorites in Fast Call, follow these steps: 1. Open the app and navigate to your favorites list. 2. Locate the contact you wish to remove. 3. Swipe left on the contact or tap and hold. 4. Select 'Remove' or 'Delete' from the options.

Organizing contacts into groups in Fast Call can be done through the following steps: 1. Open Fast Call and access the contacts menu. 2. Tap on 'Groups' to create a new group. 3. Name your group and add contacts by searching for them. 4. Save the group and access it anytime from the main menu.