My iPad Air 2 and iPhone 6 were completely wiped (don't ask why) and then set up again as new devices (not from backup). Having downloaded and reinstalled DJI GO, neither will now connect to the RC/P4. The equipment screen just shows the "How to connect" button instead of the "Camera" button. It doesn't seem to matter whether the apps are logged into my DJI account or not. Litchi will not connect either. My Nexus 7 connects just fine, apart from the usual egregious video lag. I've seen various threads about problems connecting after restoring new iOS devices from previous backups, but I don't recall anyone having this problem with brand new, factory-reset devices, and none of the solutions suggested seem to be applicable in this case. Any ideas? Am I missing something obvious?