https://fota-cloud-dn.ospserver.net/firmware/ SM-S721U USC S721USQUBDZDP/S721UOYNBDZDP/S721USQUBDZDP S721USQU1AXI3/S721UOYN1AXI3/S721USQU1AXI3 S721USQS3AYB1/S721UOYN3AYB1/S721USQS3AYB1 S721USQS4BYE2/S721UOYN4BYE2/S721USQS4BYE2 S721USQS3AYA1/S721UOYN3AYA1/S721USQS3AYA1 S721USQSACZC1/S721UOYNACZC1/S721USQSACZC1 S721USQS6BYG1/S721UOYN6BYG1/S721USQS6BYG1 S721USQU7CYI6/S721UOYN7CYI6/S721USQU7CYI6 S721USQS9CZA2/S721UOYN9CZA2/S721USQS9CZA2 S721USQS3AXL1/S721UOYN3AXL1/S721USQS3AXL1 S721USQS8CYL3/S721UOYN8CYL3/S721USQS8CYL3 S721USQS3AXK3/S721UOYN3AXK3/S721USQS3AXK3 S721USQS5BYF2/S721UOYN5BYF2/S721USQS5BYF2 S721USQS2AXI5/S721UOYN2AXI5/S721USQS2AXI5 S721USQS3AXK7/S721UOYN3AXK7/S721USQS3AXK7 S721USQS8CYK3/S721UOYN8CYK3/S721USQS8CYK3 S721USQS7BYH1/S721UOYN7BYH1/S721USQS7BYH1 S721USQU3BYD9/S721UOYN3BYD9/S721USQU3BYD9 S721USQS7CYJ8/S721UOYN7CYJ8/S721USQS7CYJ8 S721USQSACZB4/S721UOYNACZB4/S721USQSACZB4 7 15 23 14 https://ifota-apis.samsungdm.com/device/fumo/deviceheartbeat FALSE