I have root my phone, install a custom rom(cyanogen 10) and install backtrack arm like THIS.
Aircrack is correctly installed but airmon-ng don't mount wlan0 on monitor mode.
the chipset displayed is : bcmsdh_sdmmc.
I did some research on this chipset and aircrack on GS3 but i have not found anything
The exact model of my device is : GT-I9300.
Thanks in advance.