Hi friends truecaller is a genuine app for identifying sim owner nam or who is using that sim. When truecaller installed in your mobile it asked the person to access your contact and that contact name goes to their database. So say for you know someone and said his or her nam x. Then that x will store their db and when that x person call to an unkwon person and that unkwon person using truecaller then x name will display. That’s how it is working. So app concept is really good . If someone your known person try to hide his or her information easily you can catch her or him. But main thing is that in your mobile that app needs to installed and your net should be on.
Although it has several advantage but one negative side is that if someone saved name with shortcut or etc then it will display. That’s mean you can not understand his or her nick name .
Although it’s a proven app.
Install it and take the advantage.
Thanks
Debu paul