Since the inception of iPhones on carriers, unlocking has been a mere fantasy which became true later on. In early days, everyone craved and wish for a solution that would convert their iPhones from acting like an iPad Touch, without signals and only for the purpose of using apps (not the ones that required calling) and listening to music transferred from the computer or downloaded online.
Several popular networks have restricted the users from using other carrier SIMs for making calls and browsing the internet through mobile data. The most popular carriers include AT&T, Verizon, Rogers, T-Mobile, SFR France, Sprint and Vodafone. These are the most popular carriers that have carried the iPhone, which has been locked whenever carried anywhere in the world and has been tried with an unofficial SIM. Many services came onto the scene that claimed to unlock iPhone 4 handset, even from popular jailbreak developers like MuscleNerd who released his famous ultrasn0w software unlock tool that worked on old basebands. This tool has recently been updated to support the old basebands on iPhone 3GS and iPhone 4 to version 1.2.8.Apart from software unlocks, there are other solutions as well. Users who are looking to unlock iPhone 4 and 4S should give a read to this guide below:
How to Unlock iPhone 4 and iPhone 4S
If you want to use unofficial carrier on your locked iPhone 4S or iPhone 4, you will need to unlock it. In this guide I will explain how you can unlock your iPhone 4/4S on your desired unofficial SIM card.
The first thing that you need to check before even thinking about unlocking is to check your device baseband (Modem Firmware). To do so, open up Settings and go to General > About > Modem Firmware. Your devices' baseband will be one of the following:
If it says 01.59.00, then consider yourself lucky as this is the only iPhone 4 baseband that can be unlocked without any hardware modifications. All you need to do is jailbreak your device and then unlock it using ultrasn0w from Cydia.
If it says 02.10.04, 03.10.1, 4.10.01, the only option to unlock it is using a SIM interposer. The best and well-known interposer is Gevey Sim from ApplenBerry.
And if your iPhone's baseband reads 4.11.08, 4.12.01, you will be really sad to know that there is no unlocking solution available for those two basebands and there is no way to downgrade baseband to earlier version as well. The only solution is to get your iPhone factory unlocked. You can purchase the unlock from here.
Unlock iPhone 4S:
There is no software unlocking solution available to unlock iPhone 4S. But it can be unlocked using sim interposers. iPhone 4S comes with following basebands:
There are many interposers available in the market that can unlock all these basebands but the best to use is Gevey Ultra S. You can also use X-SIM which is also known to be working fine.
What to do if all this doesn’t work?
There might be a possibility that all this doesn’t work out for you, leaving you to scratch your head and wondering will you ever be able to find a solution for your locked handset. Before you decide to throw away the phone or sell it at a local brick and mortar store for cheap, or even free if you’re desperate to get it out of your site, there is HOPE for you in the form of IMEI unlock solution.
Our iPhone unlocking partners are registered companies. It came onto the scene last year, and since then, it has been the most reliable service that has ever been found on the internet to this date for doing handset unlocks (only iPhones).
They can unlock the device on most popular carriers, including SFR France, Vodafone UK, Vodafone Australia, AT&T, Rogers, T-Mobile and Verizon. The prices, off course, depend on the type of carrier the handset is locked to. The cheapest price offered so far is AT&T.
After you take the service, there’s no looking back. Your phone has been made SIM-Free forever. Feel free to use it on any carrier in the world, whether you’re exploring Brazil’s Amazon or calling for help after getting trapped in an African Jungle (though we hope you’re not that adventurous).
You will also be free to update to the latest firmwares and basebands without even the slightest of risks of relocking the device. This is because the IMEI code of your phone will be stored in Apple’s database, which means this is an official SIM-free way to make your device unlock.
Go get the most reliable solution right away.
Related To Unlock iPhone 4 and iPhone 4S :