Follow these instructions exactly.
Which Phantom do you own?I have a DJI Firmware Update Guide that says all firmware (Phantom and R/C) should be updated from DJI GO (in case your current is newer than 1.3.2).
Since DJI still provides the files for manual download, it kind of contradicts their own instructions.
You recommend upgrading the drone using a memory card, can you confirm that please?
Then, yes, I recommend you update it per my guide above.
The instructions from the current P3P manual are a bit brief, but okay to use too. Here's how they read right now:
"Use Micro SD card to update the aircraft and Intelligent Flight Battery. Connect to the Internet, launch the DJI GO app. The DJI GO app will start checking for available firmware updates automatically. Follow the on-screen instruction to update the latest firmware for the aircraft, remote controller and intelligent flight battery."
Then, yes, I recommend you update it per my guide above.
The instructions from the current P3P manual are a bit brief, but okay to use too. Here's how they read right now:
"Use Micro SD card to update the aircraft and Intelligent Flight Battery. Connect to the Internet, launch the DJI GO app. The DJI GO app will start checking for available firmware updates automatically. Follow the on-screen instruction to update the latest firmware for the aircraft, remote controller and intelligent flight battery."