According to the guys at HowToarena, a new SIM interposer for the iPhone 4S is soon to be launched. It has been named the GEVEY Ultra S and it can help unlock iPhone 4S GSM as well as unlock CDMA iPhone 4S.A few SIM interposers had already been launched for the latest Apple handset this year but they weren’t good enough. You can unlock iPhone 4S with Gevey Sim on condition that:
Your phone must be running on an iOS firmware before iOS 5.1
The following basebands: 1.0.11, 1.0.13, 1.0.14 are compatible
You need to jailbreak your phone to make it work with CDMA networks
If these requirements are met with along with some extra amount then you might go for it especially if you’re into unlocking your CDMA iPhones and especially if you’re a Sprint customer. Unfortunately Gevey Ultra S doesn’t support the latest iOS 5.1 and the 2.0.10 baseband yet, but work is going on to unlock iOS 5.1.
Learn how to unlock CDMA iPhone 4S with Gevey Ultra S Interposer SIM before it is launched which will be until the end of the month. However, we suggest you do some research before buying this to avoid any problems.