I've seen another report of this same thing although I don't remember if it was on the S7. When I open the app manually I get a blank screen, then it abruptly closes. When I get a voicemail, I just get the app close message. Oreo totally messed up this app and I can't reinstall it because it's not coming up in the app store and when I find it in Chrome, it says my device isn't compatible. Sorry I updated to Oreo now. I used this app constantly and now have to deal with calling *86 to see if I have voicemails and have to deal with the ridiculous bucketload of prompts.