I had to update my review. I just switched from Verizon to T-Mobile and the notification sound no longer works. I went to T-Mobile, they switched the default messages to the Samsung default message app and that fixed it. They say that it's compatible, but I'm not having any luck with my Galaxy S10+. Although I like the Verizon Message+ better, it only plays nice with Verizon. I know it's how companies work. Same reason I can't use an Apple app on an Android, they all have to be different.