Nokia has rolled out an update that will add the SMS and Call filter functionality on the Nokia Lumia handsets running on the Windows phone 8 OS. This feature will allow Lumia users to block unwanted calls and SMS’s.
The update will be available via windows phone store (extras and info app). Lumia 1020, Lumia 925 and Lumia 625 will initially get the update and followed by the other models running WP8. To block a number all that the user need to do is tap and hold until they get the options. There a block number option, once taped the number will be blocked. Users will no longer get the calls or SMS’s from the blocked numbers.
There is also an option to unblock if need be. So far users were using a third party app for the same and now it comes built in. There is the live tile option too wherein users can view the number that was recently blocked. It is a good option especially for avoiding unwanted calls (marketing / credit cards / Insurance etc).
The update is being rolled out slowly and probably within few days all of the WP8 handsets will get the call + SMS filter update option.
Source : Nokia.