Finally gathered some guts to do the update
All went flawlessly on the first try, no issues at all in the process. I will fly it later to see how it handles.
Some info on my setup:
Bird: Phantom 3 Standard
App: DJI GO app (Android 6.0 Marshmallow): 2.8.0
Firmware before update: 1.2.4+ (stock out of the box as bought)
Phone: Samsung Note 4
Remote Controler: Stock
Here's my process:
1. First and foremost, I placed my phone on Airplane mode so that the GSM radio is down, and placed my phone on the charger, and turned off the auto screen off and lock. Then I only enabled the wi-fi (without turning airplane mode off), and connected to the DJI app.
2. I connected to the phantom 3 standard, and returned the wifi password to the default one 12341234, then restarted both the remote and the aircraft, and reconnected to the remote with the default pass.
3. I formatted my SD card several times from the DJI GO app (just to be sure).
4. Uninstalled the DJI GO app from my phone, and went to my phone storage and removed every DJI, dji.pilot folders I can find.
5. Installed the DJI GO app from play store (android) from scratch.
6. Opened the DJI GO app, on normal wireless (home wi-fi), and I logged in with my account, then I closed the app, and disconnected from the home-wifi.
7. Turned on the remote, then the aircraft. On the first connection made in the DJI GO app, the new firmware alert was not showing. I turned off the aircraft then the remote, and exited the app.
8. I then connected to the normal wifi again, since the app already knew which software version my aircraft has, it synced I guess, and showed the new firmware alert.
9. Then again disconnected from home wifi and turned on the remote and the aircraft, and then once I connected to the DJI GO app, I was able to see the firmware prompt.
10. I then again formatted my SD card from inside the DJI GO app (just to be sure), and clicked on the upgrade button.
11. I was prompt to get connected to my home wi-fi so it can download the files. I did that and waited patiently for the files to download. Download of the files was constant at around 150KB/s and there were no break-ups.
12. Once the file was downloaded, I got prompt to connect to the Phantom wi-fi.
13. I disconnected from my home wi-fi, making sure I click "Forget network" in the wi-fi settings, so that it doesn't switch to that network accidentally in the middle of the upgrade.
14. Upgrade started, and it finished in roughly 15-20min. In the process, I was monitoring the down/upload on my phone wifi. It was constantly doing 270KB/s download and 18KB/s upload, until it started to upload the file to the aircraft, and it jumped to 2.5MB/s upload. Once it finished uploading the 60MB+ it returned to 270KB/s download and 18KB/s upload, and started the 4 beats tone (DDDD-DDDD-DDDD-etc..).
15. When it arrived around 50-60% things started to happen, first the gimble got loose, then it returned back to life, then all the lights were red, and then they all disappeared.
16. Around 70-75% the lights came back, and then I noticed that the link between the controller and the aircraft has broken (controller light was red, and the link light on the aircraft was blinking red/green/red/green/etc...). This was the scary part for me
... cause the biggest fear for me was the "No Link" issue. At that point the upgrade got stuck to 77% and I got scared... but I left it running saying to my self don't panic
. After few minutes, I moved to 78% and I noticed that the controller light was no longer red, it became green again (in the meantime there were so many different noises lol, though not loud). The upgrade then moved very fast to 89%, but the link light on the aircraft was still blinking red/green.
17. The DJI go app said Upgrade complete, restart aircraft and remote. HOWEVER, I noticed on the begining on the upgrade process, the app said not to turn off the Radio and DJI app with a big NOT. And I just turned off the aircraft, and then turned it on again.
18. And voila.... the aircraft connected to the remote just fine, and I then clicked OK in the app to confirm the restart.
19. Only thing bugging me that the About section in DJI GO app was showing upgrade needed again.
20. I did step 4 again, and installed it from scratch, and guess what
no more prompt to update the firmware, and in About section all was good and showing in order.
I was yet to go to fly and check it but I thought its more important to tell you my steps, it might help someone from getting out of trouble
and guess what.... now its raining outside
lol.
I'll write more on my first flight with the new firmware tomorrow
Hope this helps guys!
Cheers!

Some info on my setup:
Bird: Phantom 3 Standard
App: DJI GO app (Android 6.0 Marshmallow): 2.8.0
Firmware before update: 1.2.4+ (stock out of the box as bought)
Phone: Samsung Note 4
Remote Controler: Stock
Here's my process:
1. First and foremost, I placed my phone on Airplane mode so that the GSM radio is down, and placed my phone on the charger, and turned off the auto screen off and lock. Then I only enabled the wi-fi (without turning airplane mode off), and connected to the DJI app.
2. I connected to the phantom 3 standard, and returned the wifi password to the default one 12341234, then restarted both the remote and the aircraft, and reconnected to the remote with the default pass.
3. I formatted my SD card several times from the DJI GO app (just to be sure).
4. Uninstalled the DJI GO app from my phone, and went to my phone storage and removed every DJI, dji.pilot folders I can find.
5. Installed the DJI GO app from play store (android) from scratch.
6. Opened the DJI GO app, on normal wireless (home wi-fi), and I logged in with my account, then I closed the app, and disconnected from the home-wifi.
7. Turned on the remote, then the aircraft. On the first connection made in the DJI GO app, the new firmware alert was not showing. I turned off the aircraft then the remote, and exited the app.
8. I then connected to the normal wifi again, since the app already knew which software version my aircraft has, it synced I guess, and showed the new firmware alert.
9. Then again disconnected from home wifi and turned on the remote and the aircraft, and then once I connected to the DJI GO app, I was able to see the firmware prompt.
10. I then again formatted my SD card from inside the DJI GO app (just to be sure), and clicked on the upgrade button.
11. I was prompt to get connected to my home wi-fi so it can download the files. I did that and waited patiently for the files to download. Download of the files was constant at around 150KB/s and there were no break-ups.
12. Once the file was downloaded, I got prompt to connect to the Phantom wi-fi.
13. I disconnected from my home wi-fi, making sure I click "Forget network" in the wi-fi settings, so that it doesn't switch to that network accidentally in the middle of the upgrade.
14. Upgrade started, and it finished in roughly 15-20min. In the process, I was monitoring the down/upload on my phone wifi. It was constantly doing 270KB/s download and 18KB/s upload, until it started to upload the file to the aircraft, and it jumped to 2.5MB/s upload. Once it finished uploading the 60MB+ it returned to 270KB/s download and 18KB/s upload, and started the 4 beats tone (DDDD-DDDD-DDDD-etc..).
15. When it arrived around 50-60% things started to happen, first the gimble got loose, then it returned back to life, then all the lights were red, and then they all disappeared.
16. Around 70-75% the lights came back, and then I noticed that the link between the controller and the aircraft has broken (controller light was red, and the link light on the aircraft was blinking red/green/red/green/etc...). This was the scary part for me


17. The DJI go app said Upgrade complete, restart aircraft and remote. HOWEVER, I noticed on the begining on the upgrade process, the app said not to turn off the Radio and DJI app with a big NOT. And I just turned off the aircraft, and then turned it on again.
18. And voila.... the aircraft connected to the remote just fine, and I then clicked OK in the app to confirm the restart.
19. Only thing bugging me that the About section in DJI GO app was showing upgrade needed again.
20. I did step 4 again, and installed it from scratch, and guess what

I was yet to go to fly and check it but I thought its more important to tell you my steps, it might help someone from getting out of trouble


I'll write more on my first flight with the new firmware tomorrow

Hope this helps guys!
Cheers!
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