Vodafone has just launched in beta Joyn for Android completely free. It has branded this service as the WhatsApp of the operators. With Joyn you will be able to chat with one or more contacts, share files while you are chatting, or share files and real time video while in a voice call.
No need to register, sign up or have a new address book. You can test it without having a data price plan.
The application is compatible with Android 2.2 and 2.3 handsets. It’s best to have an SD memory card for the app to download and work properly. Please, note that for medium and low range handsets real time video may not deliver a good experience.
Android Market | Joyn