After upadting 13.3.1 in my iphone 7 following issues occour
1) Battery drains faster than before.
2) Get heat while using phone.
3) Can't transfer file from iphone to my laptop using cable.
4) Hagging while using whatsup. ( whats up app not work like before).
5) Memory getting fulled (i can't transfer the file from iphone to laptop).
How to fix above mention issue
Hope for your prompt repy.