Modification to Symbian s60 2nd edition phoen app

Modifications to a Symbian s60 2nd edition phone application. ? Also minor mods to a php website, but if you dont know Php I can get another developer to make these php changes. The symbian application currently runs on the phone and controls Calls and SMSs on the phone. Ie. limiting calls and SMS in using a white list of phone numbers. My modification include (1) Modify the phone app to include logic for 'Unknown contacts'. I.e. I want some new settings so the user can choose how they handle calls and SMSs from unknown numbers (this will effect the white list logic). Currently it just blocks all calls /sms from unknown numbers that arnt in the white list. (2) Add a feature to the phone app, that it can play a alter sound if a SMS arrives on the phone (rather than relying on the phone to make the sound). Full specifications are attached. Please ask if you need more info to work out the amount of work involved. ? The changes needed are highlighted in yellow