I too am trying to do this so that I can use my phone (galaxy s3) as a storage device for movies which i can then watch in the car on my ipad 3 and/or galaxy tab 2 when i am not on a wifi.
I have made it work but only when using 3 devices, my phone as a dlna server (i used imediashare), my ipad (running AirVideo i think) and another old android phone (htc desire hd) as a hotspot which both the server and the client attach to.
The s3 has hotspot and media server settings. The media server settings make file sharing possible over wifi. However, as soon as a hotspot is enabled, file sharing is automatically turned off because the phone is no longer connected to wifi.
Therefore, im looking for an app that both turns on the dlna file sharing and allows that to happen without a wifi connection. I realise that this is a security issue. Alternatively, im looking for an app which turns on both file sharing and hotspot.
Does anyone know of such an app or way to achieve this with only two devices?