Today I unpacked my newly delivered P4. I've not owned anything like this before so it's new to me. After powering up both the RC and Aircraft, they connect and I get a message 'Slide to Upgrade' so I do and get the message Upgrade Successful. I notice there are cables in with my DJI product that users are using for upgrading.. I have not used these cables and don't see their use as the upgrade procedure I just experienced seemed to do it all via the app (I presume)?! Am I missing something? What is the correct procedure for making sure all components (aircraft, RC) are fully up to date?