I may be on the same topic . I was quite confused what was happening for awhile, so bear with me without criticism. I have all 3 of Autel Drones. yes a perfectly good X-star premium with 2 swelled battery's which is my paper weight now.
My Evo 1 is my back up drone now for my roof inspection. My Evo 1 was fine till the new firmware update which popped up again, when I started using a new phone Samsung S21 Ultra. The new app has Evo 1 and
Evo 2 on it. I set it to Evo1 and then it called for an update which I did over the air. After the update it said reboot and try again. everything was checked off as loaded except the bottom right side that reads Remote with a circle by it. I myself thinking it did download, ( actually did not complete download). It did not pop up again that it needed the firmware. I did the compass calibration that went fine. Everything I thought was good ( but wasn't) I had visual on the screen and no other warnings. I took off and went up 10 ft. as usual and it just took off on it's own and did the wandering circle of death and glided down on top of the snow bank . The symptoms of a crazy loss of compass. I redownloaded the app and tried a few more times . Ok so after putting it in the snow bank 2 more times I thought I am quitting for the day. I had to think of something else causing it.
Here is what I found. I put the SD card into my computer to see what was on it. My SD card read 2.5.18 firmware for
EVO 2 How did that get there ???. I could only see it because it didn't actually copy all of it. I wiped the SD card clean and down loaded 1.5.8 manually which is actually faster. It loaded completely and said successfully downloaded which I never got before. yes it was stuck at 99 % but just give it some extra time and sure enough it was successful . I verified that the 1.5.8 was on the SD card before I downloaded it to the aircraft.
I verified after download by removing the SD card from the aircraft and read what was on it after download. The 1.5.8 was not on the SD card which means it did copy itself to the aircraft. I have had 4 perfectly successful flights after that.
Next. since my
EVO2 was flying a bit erratic . would not fly straight. I cleared the SD card and started over and manually loaded the 2.5.18 and did all the calibrations and calibrated the sticks. It is flying straight as an arrow now and flying much smoother.
I am quite pleased with the outcome . These are just my experiences that I ran across. Not pushing facts for the fact finders.
Thanks Mike