what is the difference between galaxy SM-A715F/DS vs SM-A715F/DSN?

How can i check whether my phone has never mind offer or not?I am from Bangladesh. I have bought A71 and paid for Never mind offer. But not I have doubt that i did not get Never mind offer. Also I could not remember of any text message regarding Nev....

I am using A71(official) from Bangladesh. Though i noticed that A71 got security patch update in other conutries, But Offical A71 in Bangladesh hasnot got any security update till now.Any reason for this?

I faced 1% batter drain per hour in standby mode.I turned off data,wifi, AOD and also cleared memory. But nothing works.Also I faced 7% battery drain in overnight.Has anyone face this kind of problem?★★★★★★★★★★[ Note: i have solved this issue.. Jus...