Music and sounds of PhonySpy

I work as a developer of mobile applications. My responsibilities include the preparation, development and proper registration of the application.
Preparation is the discussion and clarification of the customer's requirements.
The development of an application requires consideration of certain parameters. Such as: usability, utility program, smooth operation on the mobile operating system, the ability to increase revenue to the customer of this application.
Then the adapted application is registered.
This I have been doing for 5 years.

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