Settings/general/SAM/ Activate should be where deactivate was, (i think) if it isn't plug into itunes and allow it to activate again, If that doesn't work, change the method and select your carrier.
Yea, I went into SAM, and pressed deactivate, Then I pressed activate. Restarted and then connected to itunes. It activated and works great.
Yea, I figured that out, I could somehow call my computer though. But it was the facetime that was doing the unexplained data usage and killing the battery.
I have an Iphone 4 BB 1.59 JB with redsn0w, unlock ultrasn0w, it has been draining the battery quickly for 2 weeks. Even after the sam fix. I had originally activated it with an at&t sim, then used sam. My facetime was showing, but not working all the time. I re activated the phone last night, facetime doesn't show under a contact any longer, The battery drain issue is also gone. I am also finally getting push messages. Before, i would randomly get other peoples push messages who were not even my facebook friends.
You can only do that if you are connected to a 3g network, Not edge
I have a 3gs 4.1, 6.15 BB and my GPS works perfectly
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Opus