Verizon Wireless today introduced a new application called My Numbers that lets any single phone use up to five distinct numbers. The app is available to Android and iOS devices. Customers who want or need to manage multiple numbers can add them to the app, where each will have its own voicemail inbox and SMS inbox. Each number added to the app costs $15 extra per month. The service uses software to mimic the idea of multiple SIMs in a single phone. My Numbers is available now.