Samsung Galaxy S21 makes Google Messages app native, but there's a catch - CNET
Change the default messaging app on your Galaxy phone
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Change the default messaging app on your Galaxy phone
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How to Make a Group Chat on a Samsung Galaxy S10 in 2 Ways
Use the Samsung Messages app on your Galaxy phone or tablet
Google RCS chat features begin appearing in Samsung Messages app | News.Wirefly
What are the Chat Settings for in the latest version of Samsung Messages? When trying to access them in the UK you get the below error. I'm guessing it's for a service