Hidden Call by Sergio Yanes is an Android application that offers a simple and easy way to make a hidden call. It is designed to work with most phone carriers, and if it doesn't work, the app suggests contacting your carrier to request the correct code.

The app is straightforward to use. You enter the code you want to use to hide your number, and then the phone number you want to call. The app then dials the number with the hidden code. It's important to note that some phone carriers do not allow this feature, but the app suggests trying the code #31#, which works perfectly for many countries. If you know a code that works and it's not on the list, you can write to the developer, and they will add it to the app.

Overall, Hidden Call by Sergio Yanes is an excellent tool for anyone who needs to make a hidden call. It's easy to use, and the app provides useful information about the codes that work with different carriers. However, it's important to note that the app may not work with all carriers, and some may not allow this feature at all.