Any recommendations on how to block an unwanted call/sms? I gather that this kind of functionality doesn't come with most smartphones (if any), though I did manage to Google up one piece of software called "Call SMS Blocker". This is the kind of functionality I'm after (an excerpt from the software's feature list):

- no notification on device;
- action for calls to block: hangup, pickup/hangup, mute and optionally reply with sms;
- action for sms to block: move to 'waste basket', move to 'blocked', reject, hide and optionally reply with sms;

Of course it's not free so I was wondering if anyone had any other suggestions before I possibly head down this route.