Originally Posted by paulmac
I purchased one of these cases by NiteIze and they are quite nice, good quality. I like the fact that besides the blackberry you can carry a whole bunch of other stuff in the holster and love the blue tooth headset holder. However, I am no longer using this case as it is missing one very important feature, NO SLEEPER MAGNET. Very important feature for any BB case.
Maybe it is your case, you might want to consider exchanging it. I had the 7520 before upgrading to the 7100i and my sleeper function worked just fine with the 7520 & that case.
Nextel.com website also states this device has the sleeper function. Make sure you are inserting it with the screen facing in as the website states.
"Built in Power Down Display activator conserves battery life automatically when the device is inserted with the screen facing in.