Using RCS on lists when an Android is included

I was having trouble setting up a list with 9 iPhones and 1 Android. Everyone on the list has to have RCS activated on their iPhone or you will go crazy with duplicates. Using Spectrum as a provider, these are the steps I needed to take: Directions to activate RCS on iPhone

1.     Settings

2.     Apps (very bottom of screen)

3.     Messages

4.     Scroll down and make sure iMessage and Send as Text Message are on

5.     Scroll down to RCS Messaging (tap arrow)

6.     Activate RCS Messaging

If everyone on the list follows these directions, and has the latest software then the list will work.