I tried to install a new custom rom on my Samsung Galaxy GT-18730 (thread: http://xdaforums.com/showthread.php?t=2792157), it asked me to install and flash a baseband thing with odin, which I did. Because of that, I can't get any audio from my phone, can't play videos, and I can't send or receive calls even when I restore to my original official android. How do I get that custom thing off so I can get my sound and stuff back?