I purchased a 4k curve 55 inch smart samsung t.v. now about 5 years ago. Paid top dollar hoping for a great product long term. After 5 years we developed a volume issue. When moving volume up or down it doesn't change. If volume is up too high and i go to turn it down it just stays stuck at it's remaining position. I replaced remote but no luck. I have called tech support and again no luck. I can't even turn it up or down on the t.v. itself. In order to get it to work I have to power down the t.v. then try it again. It will work about 1 out of 5 times after cycling power or resetting t.v. but when it works it will only let me change it by 5 or 6 volume levels then get stuck again. It seems to be a problem with no fix. We have delt with this now for about 6 months and no longer like our t.v. at all. I have always purchased their products over the past 15 or more years but will not continue anymore. Very frusterating to have a top of the line product not last more then 5 years for top dollar.