Thanks for the really useful tips Ytai yes i'm using androids 4.4.4 and 4.3 and i didn't know i had to disable usb debugging.
OK I guess I'm a noob. At first I used a 9V power supply to ioio but nothing seem to happen to the phone (like usb connection was not present at all). Then I tried 5V adapter and a dialog popped up prompting me to open the HelloIOIO app (No Open Accessory dialog though) so I opened it but then a toast message appeared saying that i have wrong firmware or something so I guess I have to update the firmware first? (Perhaps I should create a new thread for my noobish questions) -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
