TrueCaller is a freeware caller id application for Nokia S60 and Windows Mobile (and soon for Apple iPhone) to perform reverse phone number lookup and display details such as name and address of unknown callers on incoming call notification or SMS inbox. TrueCaller is activated on incoming calls where the number isn’t previously stored on your cellphone.

Key features of TrueCaller for Nokia S60 and Windows Mobile include:

TrueCaller: Free Reverse Phone Number CallerId App for Nokia S60, Windows Mobile & iPhone

+ Display name and address of unknown caller or SMS sender
+ Perform manual searches by typing a phone number
+ Save information to contacts
+ Displays a small log of caller Ids
+ Hide in background, display in foreground by removing stylus

TrueCaller includes support for 23 international countries for reverse phone number lookup including United States, Canada, France, Germany, Italy, Spain, Sweden and Switzerland.

It requires Microsoft Compact .NET Framework 3.5. Download TrueCaller for Windows Mobile and Nokia S60 from here.