Thanks for being with Samsung and sharing your concern. We would like to inform you that Face Lock is not inbuilt feature of Samsung J7 Prime. However we have noted down your valuable feedback and we will surely share this with our relevant department, any update in this regards will be conveyed to you via various means of communication. 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#/
