Today's fix is real easy and depending on what tools you got, will probably take you between 10 to 15 minutes. It has to do with malfunctioning keypads. Generally, when a cell phone's keypad is not working properly it could be one of three different reasons:
1- Due to shock from a drop, circuitry is damaged thus no matter how hard you press you will never get the phone to register it. This issue is one that a certified technician would have to take care of and is nothing that we can fix here as it would be time consuming and expensive.
2- Because of moisture or heat, again, the circuitry could be damaged. Nothing to be done here really. The only thing to try best for a phone that's been subjected to moisture is to place it in a sealed container with rice. The rice will draw out the moisture and if there was not too much damage the phone should work fine. Click here to see a great Instructable that demonstrates this principle. Thank you keegsta123
3- The phone's keypad membrane is broken or dented. This is where we come in and fix the problem. Now keep in mind, the keypad membrane and the keypad itself are two different components; this is true for most models of cell phones, though there are exceptions. While the actual keypad is comprised of the buttons you press, the keypad membrane is what allows the keypad to register a touch to the circuit board (it is basically a thin, white, plasticated film with small metal sections of a hemisphere that act like mini Pogs). We will see what these look like and how it works later in the Instructable. Now on to the first step!
Step 1: Find the Phone
Go ahead and turn over the phone, remove the back cover and set this aside. Then turn the phone over again to the front.