I have an iPhone 4 black 32 gb with iOS 4.3.3 , model
I have an iPhone 4 black 32 GB with ios 4.3.3 Model#MC605ZP with 4.10.01 firmware factory unlocked. Is it safe to upgrade to ios 5 via iTunes without locking my phone? Really need to upgrade. Thanks.
iPhone 4, iOS 4.3.3