Pls help me my siemens c-35 keypad Hang pls help me
 

Hello any body there pls help me my Siemens c-35 key pad hang pls give me a good solution for get through it. I have seen in three cases of same problem with keypad Hang, I did hot air to Cpu, one day it had worked and same problem in the next day. So pls give me the right solution for it plz.........................

it hangs? does the button hangs or the button get back to his idle position but the function goes on? you can open the phone and check if there is any rust between the buttons. it could be more things that cause this. please be more detailed in your description. whe can get through this :)