| | Re: Bold 9900 - Enter number whilst in call to dial afterwards
If I recall correctly, the setting is in phone options. What you want to do is turn off.dial from home screen. You will have to open the phone app to dial, but it will enable keyboard shortcuts, such as D for notepad, U for calculator, M for messages, L for calendar, N for BBM, and so forth.
When you are in a call, hold the menu key to bring up the switch app screen and select the home screen. You can then use the shortcuts to open calendar or tasks (T) or notepad.