New Mavic owner, updated firmware with DJI Go 4 app on March 29th, process got stuck at  37%. After an hour, I quit the app and reopened. The firmware version now shows version 1.03.0500, but I never got an "update completed" message. Anyone else have this issue? I've had no luck getting a response from DJI.

Correction... it's stuck at 39%

Downgrade and upgrade with dji assistant

https://www.dji.com/mavic/info#downloads

Hard reset your phone if RvanRhee's advice didn't resolve your issue. Then recheck if your phone has the updated app. If not, retry updating the app. And be sure no other app is active in the background. At times, as well, apps will complete an update though the percentage % uploading notification is STUCK. Hope this helps

Thank you! Both of your suggestions were useful. I also spoke with DJI today. We verified that, even though I didn't get the success message while updating the firmware using the app, the firmware was indeed updated. We verified the update using both the DJI Go 4 app, and the Assistant 2 software.

RC Dude Posted at 2017-3-30 15:50
Thank you! Both of your suggestions were useful. I also spoke with DJI today. We verified that, even though I didn't get the success message while updating the firmware using the app, the firmware was indeed updated. We verified the update using both the DJI Go 4 app, and the Assistant 2 software.

Thanks for your update, nice to know it's working properly now, hope you have great experience on flight!

Here's my workaround: