Yep. It depends on the cellular network. Someone told me that they have RCS on an unlocked phone with T-Mobile. So I guess it depends on the person's cell network. I guess Verizon is one of them that doesn't let unlocked phones use RCS. Which sucks. ... View more

Hi, I'm sorry this happened. No you can't use Advanced Messaging on the Samsung Messages app on unlocked devices. I have Verizon as well and was never able to use Advanced Messaging because my phone was unlocked. ... View more