Iphone 5s

Hi,

I am using iphone5s for past 2 years. Till last month i have no issues. After the upgradation to ios 11. My iphone is getting hang after every phone call. My screen is not responding. Every time I need to swicth it off and swicth on to resolve. And battery is draining fast. Kindly resolve my issues. I am a very big fan of 5s model. I love it till date.