Search and read here on xda and you might discover there is a patched modem thread, which can help with some corrupt efs issues.
You aren't going to find an instant, easy answer as there isn't one.
Note: This quote doesn't automatically apply to everyone, decide for yourself if it might apply to you.
Originally Posted by justruss
What has this place become?
It's essentially a few people graciously answering the same repeating of immature, lazy, demanding questions from the masses.
Nobody searches. Nobody reads the first posts or titles of threads. Nobody even looks at posts a couple above their own.