I think there is no infrared sensor in this device. But by installing apps from play store it can be used as a remote control ,then the device will use its wifi feature to control the commands.
Thank you for reaching out to the Samsung community! We are glad to inform you that you can use your device as remote control via smart view application which can be downloaded from Samsung Galaxy Apps. The mobile and TV needs to be connected with the same network to control your TV. Launch the app and follow the onscreen process to control the smart TV. For more information kindly visit the link https://www.samsung.com/in/support/smart-view/
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
