iphone 4 help on jailbreaking!!

[JIMSOND]

I have iphone 4 on 4.0.1 that is jailbroken and it is not unlock I use ATT. Can I upgrade to 4.2 and just jailbreak with no problems??

[Simon]

4.2.1 is a tethered jailbreak right now for iPhone 4 so you may want to stay away until it is untethered. If you have 4.1 SHSH you can restore to that and jailbreak no problem.

[JIMSOND]

4.2.1 is a tethered jailbreak right now for iPhone 4 so you may want to stay away until it is untethered. If you have 4.1 SHSH you can restore to that and jailbreak no problem.

I never upgrade to 4.1 I ran tinyumbrella and save my SHSH and this is what was saved 4.0.1, 4.0.2, 4.1, 4.2.1 & 4.2b3. So do I have the 4.1 SHSH?

[Simon]

Yes you do. So you can just download the 4.1 firmware: iPod, iPhone and iPad Firmware Download

Open tiny umbrella, run the tss server then shift-click restore to the 4.1 firmware you downloaded. You may get a error 1004 near the end of the restore, just use tiny umbrella to kick out of recovery with the exit recovery button at the top right.

[misterdobi]

I just upgraded my 4.0.1 to 4.1 using TinyUmbrella. Now on 1.59.00 baseband.

After I got that error message, I chose the Exit Recovery button, my iPhone went to the mode for before activation mode. I had to use my AT&T simcard to activate it. Was I suppose to be in that mode?

I'm trying to unlock my phone but I can't figure out how to Jailbreak this phone without updating my baseband.

Any advice?

[Simon]

To jailbreak it you need to use either limera1n, greenpoison, or redsn0w. Dont worry about the ipad unlock thing, that only applies on iPhone 3G/3GS. You just need to jailbreak, install cydia, then install ultrasn0w from cydia.

[misterdobi]

Sorry, I don't know what the iPad thing is about. I'm guessing that's not related to iPhone4?

I read on some comments from tutorials that I can use limera1n and it will not update the baseband. My main concern was that jailbreaking using those 3 methods will update my baseband.

[Simon]

limera1n and greenpoison dont update baseband. Redsnow does but only if you select the option to do it and only on 3G/3GS.