[S6 DUOS G920FD] Dual-SIM support for most stock-based ROMs

Hi guys，

Just figured out how to fix dual-sim support in stock-based roms like XtreStoLite.

Tested with G920FD with both a 3G UK sim and a 4G China sim inserted.
I can't predict the result if you apply it on any other dual-sim models.

See my post under XtreStoLite thread.
http://forum.xda-developers.com/show...postcount=4229

Don't do it if you are completely new to rooting / flashing / modifying ROMs.
I'm not responsible for any damage caused by it.
Do it AT YOUR OWN RISK.