I see plenty of treads relating to failed updates, but nothing related to "How To" make those updates. Updating the App on the Iphone is a no brainer. So how do I search for AC updates?  And how do I go about it?  The manual (joke) does say squat about updates. While I'm on the search subject, I see the magnifer icon, but search sure doesn't lead to many answers.

Hi Bikingdawg! For the Phantom 3 SE's Firmware update, the DJI App will notify you if there is an upgrade needed.
You may refer to this video for the how-to on Phantom 3 SE's Firmware Upgrade for the AC: