I've been looking into complaints I've heard about the Google Messages RCS app. RCS of course is the fancy encrypted media-rich blah blah blah alternative to standard RCS text messages. It took years for interoperability between iOS and Android for RCS. But SMS isn't going away anytime in the foreseeable future. RCS needs a data connection to do anything, while SMS will work on virtually every cell network on the planet without a data connection being required. But still there's the big push for RCS, because marketers really, really want to send you masses of enormous media content that way. Oh goodie! In fact, Samsung announced their own SMS app will go away next month and pushes you to Android Messages instead. You won't be surprised to learn that Google's Android Messages app is full of fancy features but currently lacks crucial basic functionality that (for example) Samsung's Messages app has. For example, Android Messages can't tell you WHICH line (which SIM) of a dual-SIM phone any given text message came in on. This is critical information for many users -- the whole point of having dual SIMs is to be able to compartment two lines. That's just a single example -- the app is seriously brain dead in multiple ways when dealing with dual SIM devices. RCS will refuse to work at all if it isn't set to be THE text messages handler on an Android phone. Basically, Android doesn't want more than one app in control of text messaging at a time. The upshot of all this is that many users are foregoing RCS entirely, just not using it, and instead installing apps like Textra which provides highly customizable and advanced handling of conventional SMS and MMS messages, and yeah, users report it even tells ya' which SIM a text message came in on. It's so Google to skip crucial foundational features and concentrate on the fancy stuff instead. That's Google through and through.