The iPhone Dev Team has released the updated version of the unlocking tool called Ultrasn0w carrier that can unlock the latest IOS 4.2.1 and 4.1 firmware for iPhone 3G and 3G bands base by 13 / 05/2004. Since the iPhone baseband has 4 different OS, it takes a little longer to Dev Team to lock in the latestfirmware.
As promised, the iPhone Dev Team has released the free tools necessary support that can unlock the latest firmware 4.2.1 IOS on the iPhone 3G and 3G baseband on later than 13/05/2004. Since the iPhone baseband has 4 different OS, it takes a little longer to Dev Team to lock in the latestfirmware
All IOS devices: No matter what the IOS device if an iPad, iPhone or iPod Touch, you should back up all data first. This includes synchronization of notes, contacts, applications, etc. You should make sure you have something to come back if the upgrade does not go as planned. There are times when phones can actually brick with an update and the last thing you want is to lose all your phone numbers and data.
Jailbroken Device IOS: If you have a device that is already jailbroken then you’ll want to upgrade the IOS from 4.2 just yet, especially if you want to keep your device jailbroken. Jailbreak iPhone iPad is currently available in 4.2 and 4.2, but there are some problems to get Cydia running IOS 4.2.1 GM at the time, and experts are working to ensure that everything works well, before giving their go ahead. This is probably only a day or two, like a little ‘patience is required from you if you want to retain your jailbreak and upgrade the IOS 4.2.
Opened IOS devices, if you have an unlocked iPhone you should not upgrade to a new IOS 4.2. You must wait until there is a proven way to unlock your iPhone again before updating the phone. If the update is released without having to unlock thedevice , you can leave your phone useless to update the carrier of Apple lock the phone and worked with the current operator. You have nothing to finally use the phone, so you really should wait until the lock has been demonstrated available.