Just bought a use one, how to get Raw?

[vegetaleb]

Hi
I just bought a Yi action cam Z23L , paid half for trying it, so I want to be sure it's a good unit, unfortunately it was updated to latest FW so apparently I can't use a ''modded'' FW.
So here some questions:
-Should I downgrade the FW? And if yes how to do it?
-Posted modded FW in this forum only give more video bitrate or also enable Raw photos?
-Is it normal that video is not synced with the smartphone when capturing a video?
-And finally I get a ''low capacity'' message sometimes when recording, is it because my Sandisk Ultra class10 16gb too slow?

 

[vegetaleb]

Ok I can answer some of my own questions
-No need to downgrade, someone posted the script compatible with the latest FW
-Video not synced with smartphone screen during video recording is because of very slow SD card.
-Same thing for ''low capacity'' message, it was the slow card (Ultra Sandisk)