Avaya just released a new LITE client for the one-X Mobile app for iPhone.
This is not the full version of one-X Mobile, however it has many cool features and does not require the backend one-X Mobile server. You do need to configure the following on Communication Manager for the app to work:
1. Exension to Cellular (EC500)
2. Feature Name Exension (FNE)
3. Feature Access Code (FAC)
The app is a free download that works with an Avaya business solution that is already licensed for EC500/UC Standard Edition+.
Download App and Setup Guides at: Avaya App Store