I have the Samsung Galaxy 21 5 gig ultra. I was having a problem for 3 weeks since I've had this phone. My notifications were not popping up on the black screen. I called three different customer service people at Samsung and they all hung up on me at one point. They didn't know how to fix my issue so they hung up on me and never called me back. Two of these happened yesterday on August 4th 2021 and the first customer service professional hung up on me because they couldn't figure it out. The second one that I called 5 minutes later also hung up on me. I was not being rude I was being polite. Then the third person that I got after that I was pretty riled up and I'm surprised he didn't hang up on me because I was so angry. He went inside of my phone and I allowed that and he went to a bunch of settings and he actually fixed my problem. After calling Samsung four times I finally got somebody who helped me. His name was Domnie. God bless him for actually taking the time out and doing his job correctly. The reason I gave Samsung a2 is because everything that I buy is samsung. My TVs my last four phones and this is what I get. Thank you domini for not giving up and for actually doing your job. And doing it correctly. So that's the reason I am very very upset with your customer service. Out of four people that I called only one was willing to help me and not hang up on me. And we were not disconnected. They literally hung up on me. Because they're ignorant and they don't know what they're doing. You need to train your customer service people how to fix an issue with a cell phone. Thank you Domini very much.