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Nothing Phone builds a blue bubble iMessage bridge while Google and Apple fight over RCS
(www.androidcentral.com)
This is a most excellent place for technology news and articles.
You can read about it here: https://www.macrumors.com/2021/04/09/epic-apple-no-imessage-on-android/
Using a dominant market segment to reduce competition in another has always been an antitrust violation. A notable example is MS leveraging their Windows monopoly to force Internet Explorer on people.