Truecaller: Caller ID, SMS spam blocking & Dialer Premium is the best and most downloaded program in the field of identifying unknown contacts and blocking advertising and spam calls, published by True Software Scandinavia AB for the Android operating system. The powerful system and global database of this application enables anyone to quickly receive the caller’s information along with its various characteristics in case of receiving an anonymous call. Truecaller can be considered as a universal common telephone, in which anyone can register their information at their own discretion, so that anyone can identify it when calling others, in addition, another global system is also embedded in it. It contains millions of advertising and spam numbers and by using the anti-advertising system, you will no longer receive spam calls. In addition, Truecaller has a graphic dialing panel that you can quickly dial the number of the contact you want and call it. You only have to remember that this application requires an internet connection to search the global system, and you must enter your information completely at the beginning of the program to register and install.