(in via Ian)
Over the last couple of months we have received a number of Service Requests that dealt with questions around Devices and Operating Systems that are supported by OBIEE mobile.
The answer to this can be found in the 
OBIEE certification matrix ( Tab 5 - Mobile certification). You may want to bookmark this for future reference 
Currently the matrix contains the following about OBIEE mobile:
Did you know that we also have a 
Certification Community for BI?
You can find information and get answers to almost any question about supported platforms and systems via this community, and it is likely that this is even faster than opening an SR.
We would be happy to meet you there.