Samsung has just stopped rolout globally beacuase of a big bug in srever it will resume till the end of this week

Just restart your phone and it will download in old speed not fast but slow

Guys if you are facing slow speed in downloading one ui 7 update then this is normal due to high server load because there are large no. Of users in india so there is servers jams are takin offsssss so. It is normal to have it