I've performed an upgrade of firmware of the RC and aircraft, bad idea (newest as of 22nd March 2016)
It now says permanently "Aircraft Disconnected". Turning on the aircraft none of the internal fans engage and it makes no sounds. Plugging it in via USB to Windows or OSX machines doesn't detect as device as expected.
I've tried two devices iPhone & iPad running iOS 9.2.1. App version 2.7.1, RC 1.5.80 & unable to obtain aircraft version as the app is reporting version unknown (it will be the latest as of 22 March 2016)
Best effort when I did manage to get a connection, launching the drone using the automatic launching feature, 5-10seconds after it comes crashing down. It's like the kernel crashes as all the props, internal fans stop along with the connection dropping from the RC/app.
I've tried contacting DJI directly but haven't got a response, this is my first DJI product and my experience so far is rubbish.
Cheers,
Elijah