How can I stop a popup message I get on my Galaxy S6 everytime I turn on my phone?

[AC Question]

Pop up msg galaxy S6

Hi, every time i turn my phone on will received pop up msg Text just got better! Any idea how to get rid of it please...

ps been read another forumn about Disable Rich Communications (RCS) but could not find it on S6

Thanks

 

[rattac]

Re: Pop up msg galaxy S6

here whats it look like