Why are some messages blue and some green when both users use a Apple device?

My friend has a iPhone 13. However his phone broke and has gotten a replacement. The replacement is the exact same phone but now when I text him the messages are green.

iPhone 11 Pro Max, iOS 16

Posted on Oct 5, 2022 05:41 PM

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Posted on Oct 5, 2022 05:48 PM

Your friend needs to activate his imessage, Imessage text messages are blue, regular text messages are green.

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Why are some messages blue and some green when both users use a Apple device?

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