I am sorry you are having issues with group messaging problems with your Samsung Galaxy S9, purpleclouds1. Let's look more closely at the problem a year is a long time for having this issue. I appreciate you sharing all the steps you've tried to fix the problem without any resolution. Were you trying to use iMessage for your group chat on your Samsung Galaxy S9? Did you get any error messages? Have you tried using Verizon Messages plus on your Samsung Galaxy S9? Here's a link to help you further with more details https://www.verizon.com/support/how-to-use-verizon-messages-android/ . Please share more details so we can look into your concerns and find a resolution. 

Thanks,

EdwinW and follow us/DM us on Twitter VZWsupport