I haven't flown in a few years and was about to take it out but it's requiring an update but I'm not sure how to do that. The 'message' asking me to connect the mobile device with the aircraft. I use an iPhone to fly but not sure how this is done. All help is needed!!

Hello there Ttoi. Thank you for reaching out and for giving out these information. Kindly please post a screenshot of the error message of DJI Go 4 application showing on you mobile device for us to be able to see and can be able to give out the best help for this matter. Thank you