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Got an iPhone 4, but how to JB my old non-sim'd iPhone 3g?

W

w00master

macrumors 65816
Original poster
Jul 18, 2002
1,126
345
I really apologize if this has been asked before, but haven't seen threads on this.

I'm now an iPhone 4 user (love it), but have an old iPhone 3G. I want to keep this phone as a backup but would like to unlock it for world travel (I know you have to JB). The SIM in my iPhone 3G obviously no longer works. Is there a guide/how-to on how to do this?

Not looking to JB for non-approved Apple apps necessarily (that'll be for my iPhone 4 when it finally rolls out). It's mainly so I can unlock my iPhone 3G and load in any type of sim that I need. Much appreciated on any help!

w00master
 
w00master said:
I really apologize if this has been asked before, but haven't seen threads on this.

I'm now an iPhone 4 user (love it), but have an old iPhone 3G. I want to keep this phone as a backup but would like to unlock it for world travel (I know you have to JB). The SIM in my iPhone 3G obviously no longer works. Is there a guide/how-to on how to do this?

Not looking to JB for non-approved Apple apps necessarily (that'll be for my iPhone 4 when it finally rolls out). It's mainly so I can unlock my iPhone 3G and load in any type of sim that I need. Much appreciated on any help!

w00master
Click to expand...

Redsn0w followed by Ultrasn0w

Get a tutorial from iClarified


And if you need to fire up your 3G for any reason, get a microsim adapter ($2.50 on eBay-get the Noosy blue or yellow model) and you can drop your working microsim into your 3G and use it.
 
dhlizard said:
Redsn0w followed by Ultrasn0w

Get a tutorial from iClarified


And if you need to fire up your 3G for any reason, get a microsim adapter ($2.50 on eBay-get the Noosy blue or yellow model) and you can drop your working microsim into your 3G and use it.
Click to expand...

Really appreciate the help! :)

w00master
 
I'm also very interested in doing this. So, does your iPhone 3G need to be activated or have an activated SIM in it? Do I need to place my iPhone 4's micro-SIM in the 3G to do this? And If I do, will this mess-up anything when I place my micro-SIM back into my iP4?
 
kas23 said:
I'm also very interested in doing this. So, does your iPhone 3G need to be activated or have an activated SIM in it? Do I need to place my iPhone 4's micro-SIM in the 3G to do this? And If I do, will this mess-up anything when I place my micro-SIM back into my iP4?
Click to expand...

Using redsn0w to jailbreak your iPhone 3G doesn't require any sim. You can just simply use redsn0w to hactivate your 3G. No need for such micro sim.
 
charuzzi said:
Using redsn0w to jailbreak your iPhone 3G doesn't require any sim. You can just simply use redsn0w to hactivate your 3G. No need for such micro sim.
Click to expand...

Awesome. I read the redsn0w tutorial. It seems simple enough. One question though. I currently have FW 3.1.3 on my 3G. Do I first need to restore using the firmware 3.1.2 ipsw? Is this even possible?
 
kas23 said:
Awesome. I read the redsn0w tutorial. It seems simple enough. One question though. I currently have FW 3.1.3 on my 3G. Do I first need to restore using the firmware 3.1.2 ipsw? Is this even possible?
Click to expand...

It is possible though. All you have to do is follow the instruction and pay attention on the program called "iRecovery" :)
 
So, I sorta screwed up. I tried (stupidly) to restore using the firmware 3.1.2 ipsw when I already still had 3.1.3. Now, I'm stuck in DFU mode with the only option to restore and upgrade to 4.0.1. Is there any hope now I can go back to my original 3.1.3? No, I unfortunately did not make a 3.1.3 SSH blob.
 
kas23 said:
So, I sorta screwed up. I tried (stupidly) to restore using the firmware 3.1.2 ipsw when I already still had 3.1.3. Now, I'm stuck in DFU mode with the only option to restore and upgrade to 4.0.1. Is there any hope now I can go back to my original 3.1.3? No, I unfortunately did not make a 3.1.3 SSH blob.
Click to expand...

First of all, 3G doesn't use SHSH for 3.x.x firmware versions
Download 3.1.2, use iTunes to install it (option + restore for MAC, Shift + restore for PC)

Then use Redsn0w to jailbreak.

If you don't know what you are doing, get a tutorial from iClarified.
 
dhlizard said:
First of all, 3G doesn't use SHSH for 3.x.x firmware versions
Download 3.1.2, use iTunes to install it (option + restore for MAC, Shift + restore for PC)

Then use Redsn0w to jailbreak.

If you don't know what you are doing, get a tutorial from iClarified.
Click to expand...

This is what I did. I installed 3.1.2 from iClarified (iPhone1,2_3.1.2_7D11_Restore.ipsw) and tried to restore iPhone using it. Some error popped up and now I'm stuck in recovery mode. I plugged iPhone into iPhone and only option is to restore with most recent firmware. Is there a way around this? So, I guess what you're saying is that a 3G that has never been jailbroken can switch between custom firmwares without being validated?
 
kas23 said:
This is what I did. I installed 3.1.2 from iClarified (iPhone1,2_3.1.2_7D11_Restore.ipsw) and tried to restore iPhone using it. Some error popped up and now I'm stuck in recovery mode. I plugged iPhone into iPhone and only option is to restore with most recent firmware. Is there a way around this? So, I guess what you're saying is that a 3G that has never been jailbroken can switch between custom firmwares without being validated?
Click to expand...

Get RecBoot or use TinyUmbrella to boot phone out of Recovery loop.
 
dhlizard said:
Redsn0w followed by Ultrasn0w

Get a tutorial from iClarified


And if you need to fire up your 3G for any reason, get a microsim adapter ($2.50 on eBay-get the Noosy blue or yellow model) and you can drop your working microsim into your 3G and use it.
Click to expand...
What are the advantages / disadvantes of using redsn0w/Ultrasn0w versus Blackra1n/Blacksn0w? Is it firmware dependant. For example my wife's 3G is 3.1.2 with 5.11 BB, which of these combos would be the best provided I don't care about updating FW and just want to JB and unlock? TIA :apple:
 
Karnivore said:
What are the advantages / disadvantes of using redsn0w/Ultrasn0w versus Blackra1n/Blacksn0w? Is it firmware dependant. For example my wife's 3G is 3.1.2 with 5.11 BB, which of these combos would be the best provided I don't care about updating FW and just want to JB and unlock? TIA :apple:
Click to expand...

Redsn0w/Ultrasn0w are DevTeam tools. More stable, far fewer problems.
 
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