Here’s how to force restart an iPhone with a frozen screen in just three steps. Even the latest iPhones will occasionally freeze up and you will need to use this little trick to restart your iPhone.
While Apple provides instructions on how to restart your iPhone, they aren’t complete because recent iOS updates can make the process take a bit longer than expected. Be sure to hold the power button down for as long as it takes your iPhone to restart. It’s common to take anywhere from a few seconds to a minute.