After the GEVEY SIM, the updated GEVEY ULTRA has something better as compared to its previous version. GEVEY Ultra requires no jailbreaking or dialing to any emergency number like 112 before it unlocks. Rest of the features are same. It will unlock iPhone 4 on higher basebands. Remember that GEVEY is a hardware based solution for unlocking i Phone 4 device.
Previously it requires you to dial any emergency number like 112 before it unlocks your device. Also, if the battery drains, you have to repeat a small process to unlock it again which is kind of weird. Now, with the GEVEY ULTRA, there will be no such issues.
GEVEY SIM can unlock iv4 on higher basebands which includes 02.10.04 / 03.10.01 / 04.10.01. You can not unlock these basebands with any software like Ultrasn0w.
It also works on any firmware installed in your iDevice including the iOS 4.3.1 / 4.3.2 / 4.3.3 and the latest iOS 5.
Remember, Apple has also started selling unlocked iPhone 4s officially. But if you compare the prices, you will still find GEVEY much cheaper. And what about Ultrasn0w to unlock iPhone 4 on higher basebands?? Well lets forget about it.
For those who are unaware of Gevey SIM spoofs Authentication and IMSI number provided by the SIM card to the mobile network. This helps your locked phones to utilize any network carrier. It gets all the data from AT&T SIM to the SIM card of your choice and thats it. Now enjoying calling and SMS of any network.
Remember GEVEY turbo SIM costs you $70. Switching off your device or battery draining will result in loosing your unlock and you have to unlock it following a small process. If you are curious enough and can not listen to the promises made by iPhone Dev Team then you can use it.
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