It also depends on the where you're located

What samsung do you have

Go Samsung Members/inbox/notice, there you will find One UI 4.1 click on that one and you will see what phone received the update and what models are eligible for One UI 4.1 it will also show which month certain phones will get there updatesThe updat...

It was released last month

Try to go to your settings and go to your software update and check if your device got it it's suppose to have it