Unable to use after upgrading to 1.7.0
It shows that it needs to be paired, but the frequency cannot be connected
Check the upgrade remote and air2 with DJI Assistant 2 (Consumer Drones Series)
iphone 13 ios 15
It works fine without updating the app

Hello there Jacky Wu. I am sorry for the trouble this has caused and thank you for reaching out. Kindly please try to reinstall the DJI Fly application ( https://www.dji.com/dji-fly ) to see if the issue will still persist? In addition, please sync all of your flight records before uninstalling the DJI Fly application on your mobile device for you not to loose your previous flight information. If the issue persist kindly please try using a different recommended mobile device for us to be able to isolate the said issue. Again, I am sorry and thank you.