Hey! Ive just had the same problem. I am answering to that question later, but I hope if anyone sees it and has the same problem - none apps can't be open by touching the icon or turning off the iPhone, here is my solution. I just clicked the buttons for volume up and down and the button for turning off the iPhone together and waiting for around 30 seconds, it just went black and there was a circle loading and then it all went off. I clicked the turn on button and when it turned on, everything was okay. I hope it works for you too, guys! :)
kristiantsonevv
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