For those who are on the fence about jumping outside of Apple’s ecosystem and testing another mobile platform, you’ll first need to deal with disabling iMessage.

Apple’s proprietary messaging platform connects your phone number, email address(es) and Apple ID to Apple’s servers. Once enabled, you can message fellow Apple users from all of your Apple devices without skipping a beat.
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https://www.cnet.com/how-to/three-steps-to-disable-imessage-and-not-lose-your-mind/