https://sudonull.com/e2ee-rcs-in-ios-26-5-beta-testing
End-to-end encryption RCS in iOS 26.5 available in beta by default. Activation details, limitations and RCS Universal Profile 4.0. Test for cross-platform security — read the analysis.
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https://sudonull.com/rcs-4-0-video-calls-and-e2ee-in-chats
Learn about RCS Universal Profile 4.0: built-in video calls, text formatting, media optimization and end-to-end encryption. For Android/iOS developers — detailed breakdown of features and API.
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