call filtering
I could not find call filtering (blocking all calls that are not in the contact book) feature on iPhone 5s. Nor can I find any apps that does this in the app store. I used this feature on my previous andriod phone with an app (it filters spam SMS as well) for long time and after the switching to iPhone I have been boomed by the sales phone calls everybody. Is this feature available?
Yudan
iMac, Mac OS X (10.6.8)