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I switched from a Note 9 to an Xperia 1. Everything is working except for my text messages. I'll put my SIM card back into my Note 9 and they will start pouring in but nothing ever shows up on my Xperia 1. Has anyone else encountered this issue?
Sounds like you need to download your internet settings/mms/sms settings again.
You'll find them in the internet/network settings area, and can download/update them.