No problem, if you tick the " clear data" option, you can downgrade,/upgrade any rom you want, but there is 2 notices for you:
1. If your phone was shiped with rom version G ( international rom ), you can flash rom G or A on your phone
2. If your phone was shiped with rom version A ( rom for chinese ), you can only flash rom A on your phone.
- " Shiped " here that's mean your phone must be bought from Meizu original distribuiter, not from other user.
- How to know your phone is running on G or A version? easy, just go to " Setting -> about phone "
- You are still able to flash rom G on the phone was shiped with rom A, but there are more difficult steps must be done before flash rom and it base on your phone model. If you want, ask google .

bro the stable version.doenst showing any notifications from aap....how to.solve that problm

Is this issue occurred in Flyme 6? If it does, maybe these notifications got into 'Unimportant notifications' area in the right corner of Notification panel. For more reading you can check Unimportant Notifications   and Smart Notifications

Here is where all unimportant notifications go

1.jpeg (94.56 KB, Downloads: 51)

Download

2017-03-17 15:01 Upload

 

brooo should i need to backup all my data to downgrade my flyme 6 to 5????

KKPanda, please tell me how to downgrade my Meizu M2 from Flyme 6 global stable to Flyme 5. Step by step, please. I've tried several times but my phone is always with Flyme 6.
BTW, I have a problem with Facebook app on my new version of Flyme. The app closes almost immediately when I start it. I can't use it.

For downgrade you need to do the same thing like in update and just mark the clear data option

I've tried this 3 times but without success. My phone is again with Flyme 6.

Did you get firmware corrupt error?