How can I program my Nokia 6021?

Question

Is there any way that I can program my nok 6021? I just want to be able to manage my inbox better. I want explicit control over deleting messages: i.e. I want to choose pre-hand which messages to delete and then commission the deleting process. And if my inbox gets out of space it should automatically delete old and outdated messages.

Any idea, how to do this?

Answer 1

how to subtract two hexadecimal numbers in c.pls explain

Answer 2

I am using another Nokia set. I know to do it in my set but not in Nokia 6021