i entered my wrong pincode multiple times and now my ophone is unsvailable, how can i open it again

Click here and follow the instructions. Restoring the iPhone requires plugging it into a computer with iTunes or Devices installed, or a Mac running Catalina or newer.

If there's an option to erase it, you can use that instead.

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Wait for 48hrs and your iPhone will get back to the normal, if persist after that, then plug your phone into PC or MacBook to start the update process to the latest software