Upload pictures from iOS device using mobile Joomla

Hello,
I was trying to upload photos form iOS device using a Mobile Joomla website. The upload button is inactive and I can't get to the files. Is it due to an Apple restriction? Has anyone managed to do it? How about Android devices? I don't own one so I can't test. Any experience with uploading pictures from Android?
Thanks in advance. 

File upload is not possible on Apple devices. On Android it's supported from 2.2 on.