Most of the people that got the ICS update took some kind of negative hit. Mine was battery life and 4G stopped working. I called Sprint a bunch of times, and even went into Sprint stores and they told me I was pretty much SOL. Or they played stupid like you're the 1st person who has reported this issue.
Anyway, after some serious complaining to Sprint I was able to get a brand new replacement phone from the them. Back on GB, battery is good and 4G works like a champ!
Keep in mind, this took many, many, many, many, many calls and store visits to Sprint. But now I have a phone that works 100% the way it's supposed to work.
I know that there are people here trying to help each other out by trying several things. But in reality you shouldn't have to take the SD card out to improve your battery life or try all these crazy things. When things were clearly working before the upgrade.
This was a big FAIL on Sprint and Samsung.
Good Luck! I feel your pain. I was there for a whole week. Back on a brand new GS2 with GB.
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