Once you have jailbroken your device you need to follow these steps.
Step 1. Open cydia and click “Manage” from the bottum menu.
Step 2. Click “sources” in the middle then click “edit” near the top right.
Step 3. Click “add” near the top left and add and install this source “http://thebigboss.org/semitether”
Step 4. Once the source has been installed click on it and you will semitether, install it.
After you install semitether you will them be asked to restart spring board. your device is now semitethered. When ever you turn off your device or it reboots you can now use any stock applications, make calls, send texts, and use safari. You will not be able to use any Cydia apps, tweaks, or the mail app before you reboot tethered from redsn0w.
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