International
Who's Calling? *Can find the number of who's calling you even if the call comes from abroad derived by querying the directory search
In real time
Who's Calling? *will show you the caller's name between the first and second ring
Blacklist
Who's Calling? can block numbers entered in a special spam list. It also can block calls from unknown numbers
* If the number is in the public telephone directories and derivative search is allowed