There are ads in this application. Samsung and HTC users download the app quite often. A free .apk installation package of Mobile Number Locator & Call Blocker 3.1 is available from Droid Informer and you can check out users' reviews on this site. Prepare 8 MB of free space on your device for this app setup package and keep in mind that it runs on Android 4.1 and higher.
The app was scanned for viruses and it was found 100% safe.
Based on the users’ opinions, this application boasts such strong points as a great UI and many cool features. As users mention, the main drawback of Mobile Number Locator & Call Blocker is pop-up ads.