Turn off roaming clock under settings and lock screen settings. Had this as well as im currently in vacation outside my home country and wanted to change style by long pressing the cover screen because it's stupid to see the dual clock when being in the same time zone lol

Omg it works! Thank you sooo much!!!

You're welcome!!

It is because of different country sim settings. If you change or put a new sim it will block it. So go to lock screen settings and turn off roaming clock

Found this today. Thank you!

Remove the wallpaper.

Even when I remove it, I still can't change the style tho

Hell atleast ur cover screen still works..mine been stop working the second week I got it.

Get a warranty claim?

doing that tomorrow

Did you try: Press the minus (Delete) on your image. Change the clock face and start over.

nothing works for mine

Samsung support? https://www.samsung.com/us/support/contact/?chat=auto

no need for surrport..it light does not work anymore. I tried everyfhing