My iPhone was accidentally locked down (find my iPhone app)

My iPhone was accidentally locked down with "Find my iPhone" by the previous owner while I was recording a interview for my exams.I already contacted the previous owner, who said that he dealeted my phone device from his "find my iphone" app. The Iphone also inform that my sim-card is locked and asks for the pin-code. But it is not showing the telephones keypad.

Is it still possible to get the recorded file or is it deleted now that my phone is locked?

Hope you can help.

Line Mayland Carlsen