If you want to back up your important and sentimental text messages on your iPhone, go to the Messages app, tap/hold the text you want, and paste it into the mail app. Email the content to yourself and print away! For voice messages, try eCamm Phone View for about $30.
Peter upgraded his iPhone to the latest version of iOS 12, and ever since then, his text messages haven't been sending right away. Leo says the first thing to do is call his carrier. There are two ways messages get sent on an iPhone, however. It's either being sent with iMessage which uses his data, or as an SMS. He's only having this problem with the built-in Messages app, and it's with everyone. Leo thinks it has to do with his wireless carrier.