You can now enable iCloud over 3G, FaceTime, Photo Stream and large App Store downloads on iOS 5 or higher using 3G Unrestrictor 5. This popular jailbreak tweak has just been updated with iOS 5.x support.
Regardless of the fact that FaceTime has been a widely appreciated feature ever since it was launched back in 2010, Apple has never officially allowed FaceTime calls to be made over 3G networks. Granted that a FaceTime call on 3G would require substantial amount of data, but one must also account for times when making a FaceTime call is important and there is no WiFi hotspot nearby. Luckily the latest update of 3G Unrestrictor from Kim Streich allows you to enable iCloud over 3G as well as FaceTime on iOS 5.
With the public release of iOS 5 back in October last year, Apple introduced a couple of new features, now commonly known as iCloud and Photo Stream. iCloud comes as a working substitute of MobileMe whereas Photo Stream is an entirely new feature that brings together all pictures taken from your devices that are synced with one Apple ID and adds them to your iCloud account. These pictures are then automatically updated in the Photo Stream folder of every device. Granted that it takes convenience to a whole new level because merely seconds after you take a photo with your iPhone, it will automatically be available on your Mac. The drawback here is similar to what there was with FaceTime. Apple does not officially allow iCloud and Photo Stream to work over 3G network. Your iCloud account can not be synced and Photo Stream won't sync unless you're connected to a WiFi network. With 3G Unrestrictor 5 you can not only enable iCloud over 3G, but you can also enable Photo Stream.
Not many people are aware of the fact that App Store downloads exceeding 20MB are not allowed on 3G, and high quality video playback on native YouTube app is not allowed on 3G as well. Even for that a WiFi network is mandatory. So apart from letting you enable iCloud over 3G, 3G Unrestrictor 5 also lets you enable large App Store and iTunes Store downloads, high quality video playback in native YouTube app as well as many more.
Contrary to popular belief, the best things in life aren't always free. If you have previously owned a copy of 3G Unrestrictor back in iOS 4.x days, you will only have to pay $0.99 to upgrade to 3G Unrestrictor 5. New adopters will have to pay a one time fee of $3.99. Well worth it's value. Just fire up Cydia and search for 3G Unrestrictor 5.
A jailbroken iOS device is required for you to install this tweak and enable iCloud over 3G. Follow this full guide on how to jailbreak iPhone 4, iPhone 3GS, iPod touch 3G, iPod touch 4G and iPad 1 untethered on iOS 5.0.1.