Travelling to Shenzhen China as guest of Oppo, Stephen and Trevor discover what it takes to test a new smartphone camera, to calibrate it, and even see some products Oppo doesn't currently plan to release - along with factory floor where thousands of phones a day are produced.

And Optus, oh Optus, why are you doing this. Their explanation is out, but their CEO isn't. Why their compo is bad and more.

Plus, how to get round Sydney Airport in a breeze...