iPhone Attach file

Dear Sir,
I developed my whole site through my iPhone.
All is working fine…template and plug-in too.

WPDownloadManager, generally, works also fine via iPhone, but It is not possibile to ADD NEW file via iPhone.
In the Attach file box, the “Upload” > “Select file” is not working….so you cannot use iPhone to upload new file.
I Always has to start my PC and upload the new file with PC. Not possible through my iPhone.

Is it a bug? or is it a limitation of the tool?
It’s really a pitty..

Thanks in advance for any feedback.

Andrea