Thanks for reaching out to the Samsung community! We would like to inform you that if you have forgot the pattern and no password recover option is available. Then the device need factory reset to use the lock and mask app. We would suggest you to use Smart switch PC suite for data backup of your device and then reset. Download smart switch from link http://www.samsung.com/in/support/smartswitch/
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#/
