What's the latest official iOS that won't upgrade my BB to an unlockable version? 3GS
I'm new to the forums and I landed here because I'm stuck with an iPhone 3GS - and I'm hoping one of you iExperts can give me a hand ;)
I bought a used iPhone 3GS off the street and it was jailbroken and unlocked. I failed to ask the owner what method was used or any details about the phone other than the capacity :S
I wanted to get rid of all her information on the phone so I immediately went to settings when I got home and did a full data reset. Unfortunately, once the phone rebooted it now gets stuck on the Apple logo with the progress wheel spinning for a few seconds than hangs. It will do nothing until the battery runs out - can't even do a hard/soft reset or turn the phone off.
I decided to try and use redsn0w_win_0.9.6rc16 w/ 4.3.3 iOS firmware to unlock it, however try as I might I'm unable to get the phone into DFU since I can't turn the phone off in the first place. I can let the phone die completely, which obviously turns it off, but when I plug it in as soon as it has enough of a charge to be turn onable (and thus go into DFU) it automatically boots and crashes as mentioned before.
The closest I've been able to get to is getting into Recovery Mode by holding down the power button and plugging in the USB until the phone turns on and gives me the Connect to iTunes logo. iTunes detects it and offers to restore it. However of course it's only going to take an official restore since I have no SHSH blobs for the phone, and much less know what OS or baseband the phone was running...
What would be the latest iOS that I can load onto the phone, using an official restore, that won't upgrade my baseband to an unlockable version? Like I said I have no idea what BB is on it right now, and once I've done that, what method would you recommend to do an untethered jailbreak and unlock?
I just want some feedback and help before I do anything that's going to lock my phone for good since there are no carriers I can work with here in Costa Rica that will take the lock.
Hoping for some help and I much appreciate it!!!