I'm having a problem calibrating the gimbal. Sometimes it will go to 67%, 77%, 83%. then I get the message "Gimbal Calibration Failed."
Not sure why...
Any thoughts or suggestions will be appreciated.
Thanks.

Hello, is there an error message in the app when the calibration failed? Please provide me with a screenshot of it. In most cases, we suggest that users try to restart the drone and calibrate it again.
If it just keeps failing, please help to confirm if there is an impact damage or a crash before, try to refresh the firmware or send it back for an overall check if necessary.  Here is the link to apply the online repair: https://repair.dji.com/en/SelfRepair/Area
Will do the best to help.

Thanks for the timely response. No error message, only "Failed to calibrate" notice. I used a different cable from the controller to the ipad mini 4 and got it to calibrate.
I'll give it  few day and try it again.
Over all, I'm very happy with the Mavic...it exceed my expectations.