Problem with "end call" button

[Guest hitman 47]

My cellphone's "end call" button doesn't work. The mobile had some falls in the past and I believe that this is the main reason of not working now. I should also say that it wasn't always "dead" the button..sometimes, when I was pressing it with more power or pressing to the left side (near to the center button) it worked..(and some of these times it worked liked the middle one).

Recently I discussed with a friend of mine and he mentioned that this could be solved with another digitizer (or something like that). Do you have any solution??