1. Start the NAZA Assistant, go to Upgrade
2. Click on the blue text (No updates) next to Firmware e.g. 3.1 in the assistant under info. A pop-up box will appear.
3. Type the word 'door' there is no need to put your cursor anywhere, just type that word and another box will pop up.
4. Type 'test' for the user name and '125' for the password.
5. Follow the remaining instructions to 'upgrade' (in fact it's a downgrade) and the NAZA will be reverted.
6. After the progress bar is done, power cycle the Phantom.
7. Do a software compass re-calibration and when done, follow this by a manual compass calibration
