1. Check your signal strength. If there is no signal reception, your phone won’t be able to receive calls.
2. Ensure you are not on Airplane mode or Do Not Disturb.
3. Check your phone settings to make sure you have not unintentionally blocked incoming calls.
4. Make sure all relevant mobile network services are enabled. If not, enable them and restart your phone.
5. Make sure your calling plan includes incoming calls.
6. Check to make sure your mobile device is not locked.
7. If the problem persists, contact your carrier for further assistance.