Same. Locked. I keep hearing that's the key for Samsung Messages RCS with tmobile, a locked device? I have it with my husband's Samsung and mom's LG along with a handful of friends. Most people I know use iPhone anyway so RCS is a moot point with most people who I regularly message. Many of use use Signal as well to share larger files or video
Agreed. Yes, Google Messages is there but I like a cohesive experience, and since I like the Samsung native apps I wish my Messages app looked the same. I'm on an unlocked phone and don't get RCS through my carrier like others.
I remember late last year samsung messages started adding Google RCS natively to the messages app but it seemed like it only happened for a small number of users then stopped. Article about it in case anyone is interested: https://9to5google.com/2020/12/16/samsung-messages-rcs-google/