Hi I'm new here but I've experienced the gsiff_daemon issue on my s3 which drains the craps out of your battery and shows up on tour battery usage screen as android system. Thus is my attempt to help out others who may have this issue . So if your battery screen is showing android system is using like 70%+ then you most likely have the same issue. I've noticed it only happens when my phone hot boots . The best way to tell is go to Settings/ developer options / then check the box that says show cpu usage and it will most likely look like the screenshot I attached . The only way to get rid of it is to reboot. If anyone has any new news on the gsiff issue then post it here . I have to reboot every few days cuz it's alway s showing back up.