A frozen phone is a common (and frustrating) phenomenon, but there are ways to bring your device back to life. If your iPhone isn't responding, and you're not able to power it off and then on again, ...
You can turn off call forwarding on your iPhone, or turn it on again at any time to receive calls on a different phone.
You can turn off Siri to prevent the virtual assistant from listening to your commands by disabling it in the Settings app.
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