i will say there can be number of issue of this problem .first you have to unfreeze the phone in order to perform any trouble shooting just follow How to Boot phone in safe mode and first clean the phone from junk and remove any other software from system which is making your phone slow and freezing . try and see if that works . Gud luck
I think you might wanna give you some tips on this - try a hard restart on your phone Plug it to charge and leave for 20-30 min and than try restarting your phone and than first You may want to boot your phone in safe mode see if that help checkout this post about how to go in safe mode checkout Guide to Boot your phone In safe mode see if this works for you . thanks and i hope this will help
