Incoming calls are not free: they will be deducted from the talktime you added to your customized Base Plan.
Remember, you can activate Unlimited Incoming Calls Plus option right in the Circles.Life app > Home > Add-on Options > Click on + sign > Toggle to the right to enable for $2 per month. Find out more about this Plus option here.
(Please note that both local incoming and outgoing calls will be deducted from your Talktime allocation or charged if you've exceeded this allocation. If the call is forwarded to an international number, IDD rates will apply.)