I'm new to cell phones and need a bit of advice, if what I wanna do is possible. What can I do about my password?

As long as the phone is completely turned on, I don't have to enter the password to do things on it but, if it goes to sleep after non-use, and I get a phone call coming in, it refuses to let me answer the call!! I'm guessing that it wants me to punch in the password before it'll let me take the call but it won't let me go to the password screen, either!!
Is there a way to keep me from HAVING to re-enter the password just to answer a call?

I'm new to cell phones and need a bit of advice, if what I wanna do is possible. What can I do about my password?
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