De que compañía? is an Android application that allows users to check which operator or provider their phone line belongs to, whether it is mobile or landline. This can be useful for individuals who want to save on telephone costs by taking advantage of reduced or unlimited rates offered by their operator.

The app provides a simple and straightforward interface for users to input a phone number and receive instant information about the operator or company associated with that number. By knowing the operator, users can make informed decisions about their phone usage and potentially save money on calls.

De que compañía? is a free app, making it accessible to a wide range of users. It falls under the Social & Communication category, specifically designed to assist users in identifying their phone line's operator or provider. With its easy-to-use interface and helpful functionality, De que compañía? is a useful tool for anyone looking to optimize their telephone expenses.