Can anyone explain how to upgrade or reinstall the firmware on the remote controller.

For an upgrade, leave the Spark off.  Turn the RC on, connect your phone to it's wifi.  Load DJi Go on the phone, which should detect and notify you if there's an update.

Try this: https://www.facebook.com/DJISupport/videos/1485544304865495/

jiminythompson Posted at 2017-11-17 05:37
For an upgrade, leave the Spark off.  Turn the RC on, connect your phone to it's wifi.  Load DJi Go on the phone, which should detect and notify you if there's an update.

thank you...i updated

jiminythompson Posted at 2017-11-17 05:37
For an upgrade, leave the Spark off.  Turn the RC on, connect your phone to it's wifi.  Load DJi Go on the phone, which should detect and notify you if there's an update.

thank you for the feedback

sibu Posted at 2017-11-17 07:06
thank you...i updated

So you had worked it out, right? Congrats, should you have any further questions, please feel free to contact us at any time, we're glad to help.