magicApp
magicApp is an application that will allow you take your existing numbers with you all the time but use the communication services of this application.
3 Alternatives To magicApp
TextMe
TextMe is a free calls and messaging application at both local and international levels.
WWChat
Indie Chat / Messenger for Android
mjoy
mjoy is a free messaging application allowing its users to send unlimited text messages to any mobile number currently registered by any cellular service across the globe.