iPhone X freezes at the end of a call
I've recently bought iPhone X (256GB) and updated the iOS to 11.1.1. Lately I am having an issue while ending a call. Once the caller ends the call, the phone gets into a frozen state. At times, even shutting down the phone forcibly does not work. All the touch sensitivity and the Face ID recognition do not work. This state lingers for good 15-20 seconds at least before the phone revives again by itself.
This is irrespective of making the calls through the phone dialer or through Apps like Skype.
Not sure if anyone else has been facing this problem with iPhone X or iOS 11.1.1. Any help will be really appreciated.
NB. Earlier I was using iOS 11.1.1 on iPhone 7 Plus; but never faced this problem.
iPhone X, iOS 11.1, iPhone X 256 GB