Just two weeks after launch, the Stratosphere is not protected anymore. Developers have made a big fat hole in it and you have a fully unlocked Samsung Stratosphere.
This guide for rooting the Stratosphere is a little advanced compared to most of the other guides for phones. Unfortunately, for now this is the only way. If you follow these instructions step-by-step you should not have any problem.
Download Heimdall 1.3.1 and extract the zip contents to a folder. Make sure to install the C++ distributable mentioned in the download section or the tool won’t run (Windows only).
Download Stratosphere Root.zip for later use in this guide.
Put your phone in download mode by holding the Vol – key while powering the phone on.
A pop-up will emerge. Select ‘Accept‘.
Now you should see the message “Download Mode Do Not Turn Off Target“. This is when you plug your phone in.
Set up the drivers from the ‘zagig.exe‘ app in the ‘Drivers’ folder. The dropdown box will say something like ‘Gadget Serial‘. Click ‘Install Driver‘.
Extract the ZIP files from Step 1 in the same folder as Heimdall.
Run Command Prompt and type the following.
You should get a ‘Device Detected‘ message in return.
Enter the following command. The phone will reboot during the process.
heimdall flash --kernel root-zImage
Make sure you have ‘USB Debugging ON‘
After you type the following in your Command Prompt you will see a list of your devices attached. Your Stratosphere must be one of them now.
Now you must remount the system by entering the following command.
Now we need to push a few files. Enter the following commands one-by-one
adb push su /system/bin adb push busybox /system/bin adb push Superuser.apk /system/app
Change permissions on SuperUser and BuyBox by entering the following commands.
adb shell chmod 4755 /system/bin/su adb shell chmod 4755 /system/bin/busybox
You are done and ready to go. You can test the root by testing any app from the market which requires root access.
In case of any problem you can post here to get direct response from developers.