The phone currently has the sms & call filter that came with the phone. It's ok but have to block numbers manually but it doesn't fully block them, it redirects call to my voicemail and text messages to a separate message box.
I'm looking for a way to completely block calls and messages from numbers that aren't on my contacts list.
Read more: Is there an app available for a windows phone (Lumia 820) that only allows calls from contacts?