Hi there! Thank you for choosing Roku and for sharing your thoughts. This doorbell can view a complete 150° area both horizontally and vertically. To resolve the issue, try updating the detection sensitivity to 100 in the Detection settings on the Roku Smart Home app. Make sure both the doorbell and your mobile phone have a stable internet connection and are updated to their latest versions. If the issue persists, perform a factory reset by pressing and holding the reset button down for a few seconds until the status light starts flashing, then re-set it up like a new device. You can refer to this link to see a detailed setup process and troubleshooting steps for possible issues you might encounter. If you need further assistance, don't hesitate to contact us at https://support.roku.com/contactus. We hope this helps! Roku Customer Advocate