Thank you for reaching out to the Samsung community! We would like to inform you that the camera resolution changes if you use the camera preview screen in full screen mode. If the resolution changes automatically reset the camera from it settings and check.
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#/
