How to Unlock iOS5
I have a GSM AT&T IPhone 4 that runs on iOS5 that want to unlock to run on TMobile.
1) do I need to jailbreak in order to unlock ?
2) Are there certain iOS5 versions ot any other attributes, such as firmware versions, etc that cannot be unlocked at the moment?
3) What is the procedure to get my phone up and ready to run on Tmobile?
4) Where does Baseband come into play- does each phone have a unique baseband, or baseband is the same for all devices locked onto a certain carrier?
- 10-18-2011, 08:53 AM #2
The only way is with a Gevey Sim, but I'm not sure if by updating to iOS 5 you updated the baseband to one that is not unlockable at this time.
To my knowledge: MMS messages have an issue (though this may be resolved), and 3G will not work (nothing you can do about this, the 3G band is different for T-Mobile)
Baseband is also referred to as "Modem Firmware" in your Settings app. Certain ones are unlockable, others are not. Once you update, there is no way (that I know of) to go back. Unlockers are always cautioned about updating software and especially baseband before an unlock is available.
- 10-18-2011, 09:14 AM #4
The user didn't do anything.. the actual act of upgrading to iOS 5 is what changed / updated your Baseband
Once its updated, there is no way to downgrade it - it's a system level modification and would require a low level exploit, ones that actually rely on hardware faults, not software holes like the 4.3.3 PDF exploit..
- 10-18-2011, 09:17 AM #5
You know, I've had high rates of success with using my local Craigslist, posting that I have a locked to <carrier> iPhone 4, and want either a factory unlocked or locked to <carrier> iPhone 4.
For factory unlocked (bought directly from Apple store), you usually have to pay a bit of money on top, but carrier locked swaps I've never paid for.. chances are they're in the same boat you are and are happy to switch, assuming that the carrier they're on has an iPhone available..
- 10-18-2011, 09:30 AM #7
Settings > General > About - look for modem firmware.. if it's anything BUT 01.59.00, then you can not unlock it without hardware modifications like the geevey SIM, which is unstable and not recommended.
You can downgrade iOS back to 4.33, but your Baseband will remain the same, as it's a permanent change. Back in the day when iPhone 2 and iPhone Software 2.0 was king, there was a program called Fuzzband, but that no longer works on newer devices, or devices with iPhone Software 3.0 and up.
- 10-18-2011, 09:49 AM #9
now very anxious on going back home and checking out the firmware versions on the 2 iphones i bought yesterday for my wife and I....if its not the ...59.00 i think i'm screwed with my purchase...very upset over this
- 10-18-2011, 05:40 PM #12
- 10-18-2011, 06:03 PM #13
- 10-18-2011, 07:37 PM #15
Nope, it'll still be on iOS5, and the same BB.
Accept it, it's perma until someone develops a way to unlock it.
We feel for you.
Since you said you bought it 2nd hand, perhaps you can resell it, and get a new one which is already unlocked.
Last edited by Snownation; 10-18-2011 at 07:41 PM.