I've been trying to do the latest update since last time I tried to fly I couldn't due to the required update. I've tried multiple times and always have the same issue. Please help!
You can download the DJI Assistant 2 application from the Mavic downloads page. Here are instructions for updating the firmware using the DJI Assistant 2 application:
WiFi can be problematic because the controller and MP use the same frequency range and can completely overwhelm local WiFi and Bluetooth. Try using a long USB cable to get the phone and RC/MP as far away as possible.