Thanks for being with Samsung and sharing your concern. We would like to inform you that SIM change alert feature is not available in A7 2017 device, however you can use Find My Mobile services for the same reason by navigating to Settings >> Lock Screen & Security. 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#/
