If you want to fix the SOS displaying on your phone, here's what to do. But the issue may lie with your carrier.
If your iPhone lacks a home button or your actual home button is not working, you can add a virtual one using AssistiveTouch. Here's how.
How you take a screenshot depends on whether your iPhone uses FaceID or Touch ID. Either way, you can also take a full-page, scrolling screenshot.
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