iPhone unresponsive, doesn't shut down, apps don't open

"Phone unresponsive, doesn't shut down, apps don't open: iPhone 15 with iOS26: how do I shut down my iPhone? the phone seems frozen and unresponsive, the apps wont open either.."

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Unresponsive iPhone:

Perform a Froce Restart. Go here: Force Restart iPhone - Apple Support

"Phone unresponsive, doesn't shut down, apps don't open: iPhone 15 with iOS26: how do I shut down my iPhone? the phone seems frozen and unresponsive, the apps wont open either.."

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Look into clearing space, as that can stall an iPhone, too.

Maintaining iPhone Storage:

Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support

So, what to do...

Clear Space Using my User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip
• How to Clear "System Data" in your iPhone's Storage - Use Backup - User Tip