Get SlingPlayer for iPhone working on 3G!

Since the release of the SlingPlayer iPhone app in the App Store yesterday, there’s been much noise about AT&T’s restriction that makes the app operational over wifi only. But as usual, the jailbreak community is here to save the day! If you haven’t jailbroken your iPhone yet, here is reason #1,563,982 to do it…

Thanks to VoIPover3G, you will now be able to use the SlingPlayer app over 3G and Edge. VoIPover3G can trick any application into thinking that it is on Wifi even though it is on a cellular data connection. You can configure what apps get tricked by adding the app’s bundle identifier to “/Library/MobileSubstrate/DynamicLibraries/VoIPover3G.plist”.

In order to use this simple hack, your iPhone must be jailbroken (see quickpwn tutorials) and you must install Mobile Substrate, OpenSSH and VoIPover3G (reboot after install) from Cydia.

Assuming you’ve installed these apps and that you know how to SSH into your iPhone, follow these instructions:

1. SSH into your iPhone and go to the root directory “/”

2. Navigate to /Library/MobileSubstrate/DynamicLibraries

3. With a text editor, open VoIPover3G.plist

4. Look for:

Filter = {Bundles = (”com.Fringland.Fring”, “com.apple.AppStore”, “com.audiofile.Interstate”, “com.apple.MobileStore”);};

Now add this part: , “com.slingmedia.SlingPlayer”

It should look like this:

Filter = {Bundles = (”com.Fringland.Fring”, “com.apple.AppStore”, “com.audiofile.Interstate”, “com.apple.MobileStore”, “com.slingmedia.SlingPlayer”);};

Don’t forget the “,” and the quotation marks!

5. Save the changes you just made and upload the file back to its location: /Library/MobileSubstrate/DynamicLibraries

6. Reboot your iPhone

7. Done! SlingPlayer should now work over 3G!

also here too
http://www.iclarified.com/entry/index.php?enid=2128