I raised a ticket in technical support and they just closed it without any answer. Looks like Line 6 tech. support reps are not very supportive !

So, I'm putting this question to the community here:

Line 6 claims that Mobile In has a LINE IN STEREO input, and is capable of recording in stereo ( see here and here )

In the second link, the author and the Line 6 rep claimed that BlueFire app successfully records in stereo through the LINE IN STEREO input.

However, I've tried BlueFire , Fire 2 (paid version of BlueFire), TASCAM and several other recording apps, all without success.

Every app recognises the LINE IN STEREO input as MONO, and I'm definitely feeding it a stereo signal (I've confirmed that the source audio and the cable are both stereo, and the cable works fine everywhere else)

So, is Line 6 Mobile In LINE IN STEREO input really stereo? If so, can anyone recommend any recording app, which has successfully recorded in stereo from it?

I would appreciate any replies. I'm really looking forward to be able to use my iPhone for stereo recording, and this was one of the reasons I bought the Mobile In interface.

(using an iPhone 4s - iOS 5.1.1)