No no wire needed. You connect via WiFi. Its recommended to use a small tablet. Something quality with a quad core. Also buy yourself some good memory for your 4K like SanDisk 64GB class 10 U1 look for the ones with U3 in the picture. Get it from B&H Photo online.
Thanks Stanley. So it looks like any needed updates in the future are taken care of without a cable connection. Thats not explained in the dji paperwork.
The Phantom 3 4K model is a Standard Phantom 3 with 4K video camera. That's the only difference. It does not use lightbridge tech, it uses WiFi for the video feed.
Return it for a Phantom 3 Advanced or Pro, you'll be much happier. <- Seriously.