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.