After restoring the device in iTunes, the user is prompted with the usual unlocking message: “Congratulations, your iPhone has been unlocked.”
This message wasn’t enough for me though. I need more proof that I could use the iPhone on every carrier and abroad.
After receiving the notification my new iPhone was unlocked, I cut a micro-SIM card into the shape of a nano-SIM by using the AT&T SIM card that was already in the iPhone 5S as a guide. In a couple of seconds, the iPhone was able to pick up the T-Mobile network, and calls and EDGE data connectvity worked as expected. Some reports, including on AT&T forum, confirm this.
The iPhone 5S we tested was bought in an Apple retail store, but we couldn’t confirm this with another, pre-ordered iPhone 5S — even though the device was purchased at full price, it was tied to an existing AT&T account during the pre-order process. The carrier clearly states on its website that you have to be either a former customer or a customer without contract obligations to be eligible to go through the entire process, fax included. It could be problematic as well if you bought your iPhone 5S directly from AT&T.
I was not able to unlock through the restoring method that you have specified..may be mine was iPhone 3GS.I would like to share my experience in unlocking my iPhone 3GS.I wanted to unlock it from the respective locked network but did not want to jailbreak it.As jailbreak makes the user to lose the warranty of the phone.I was also not comfortable in using the available unlocking tools.I searched and found that Theunlockspot.com provides such a permanent unlocking service for iPhone models.They unlock the iPhone through the remote unlock service which would be a better option because,we need not give the mobile to someone else nor do we have any chance to enter the wrong unlock codes.This type of unlocking was very apt for me.I unlocked my mobile and now free to switch networks.
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