Apple has started fixing its Activation Servers to block SAM Unlock . According to MuscleNerd , Apple is in the process of updating its Activation Servers to block SAM Unlock method which is being used worldwide for mass iPhone unlocking . If you have managed to unlock your iPhone using SAM then you must take a backup of the activation key either using iFile or Redsn0w as explained here . Since Apple is yet to update all its servers , there is chance that SAM Unlock may work for some of you with several tries of hit and miss .
About SAM Unlock 04.11.08 – 04.12.01 :
SAM is one of the easiest and most effective way to unlock carrier locked iPhone 4 and iPhone 4S . AT&T locked iPhone’s could be easily unblocked using SAM just by jailbreaking on iOS 5.x.x . SAM Unlock recently gained fame in the jailbreak world with hundreds and thousands of locked iPhone’s getting unlocked in the first few days of its release . SAM Unlocked phone can be used with any carrier around the world .
Carrier Locked iPhone and Activation Process :
Apple locks the phones to work with a certain carrier only and sells the phone at a subsidized price . Because of its huge price , users prefer to buy a locked iPhone for cheap and then unlock it using various unlock methods (posted here) . Till this day , there are several working methods to unlock iPhone 4 like UltraSn0w , Gevey Sim , R-Sim , TP-Sim , Gevey Ultra S Sim etc . SAM Unlock was the latest in this series and could successfully unlock iPhone 4 , iPhone 4S on 04.11.08 and 04.12.01 basebands .
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