New phone not receiving all texts.

walkabout

    I bought an unlocked pixel 3 and installed the SIM card from my old Galaxy 6. All services seem to be working except that I don't receive text from some individuals. I've gotten some texts from my mom, a group chat, and myself (testing it). There are some folks I can't seem to receive messages from. I've also tried a couple of those internet sites like textem.net to send messages to myself but do not receive them.

     

    Any tips?

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