It has been since long that iPhone 3GS [S5L8920 bootrom] and iPod Touch 3G [S5L8922 bootrom] are being shipped with new iBoot 359.2. There are also iPod Touch 2G units that are being shipped with new bootrom and iBoot. All of these iDevices i.e. iPhone 3GS, iPod Touch 3G/2G with new bootrom and iBoot are distinguished as MC models.
So why should we be concerned about these? Actually, the exploits are used in bootrom and iBoot to execute Hacker’s own code which eventually jailbreaks iPhone or iPod Touch. There has been a popular exploit named as 24K Pwn which kept iPhone jailbroken. New Bootrom has been implied by Apple to patch this exploit in iPhone 3GS and iPod Touch 3G/2G [MC Models]. So, jailbreaking MC models of iPhone 3GS and iPod Touch 3G/2G no longer works until there is an exploit for new bootrom.

A userland jailbreak can do the task like Spirit Jailbreak does but these jailbreaks are not sustainable for a longer period as they are patched easily with new version of iTunes and it can also create problems for users who used userland jailbreak even in updating to new firmware. Therefore, users who implied Spirit Jailbreak are advised not to update iDevices to iOS 4
What is status of exploit in new bootrom? Actually, new bootrom and iBoot both have been exploited successfully. GeoHot and p0sixninja are the nerds who have been successful to find these vulnerabilities. Geo Hot has even demonstrated it in a Video also but he didn’t reveals any release date. The unofficial updates are that his new jailbreak tool will be limera1n while unlock tool will be limesn0w. He has also disclosed some information regarding it recently.
p0sixninja hopes that these new bootrom and iBoot exploits to jailbreak MC models of iPhone 3GS and iPod Touch 3G/2G will be released after iPhone 4 is out for public. This means that exploits are being held so that they are at once released for iPhone 4 and 3GS. This would make impossible for Apple to patch exploit in first batch of iPhone 4. We can say that there are only some days left before we can actually jailbreak MC models having new bootrom.
Update: You can tether jailbreak iPhone 3GS new bootrom and iPod Touch MC models with sn0wbreeze 1.7
Update: There is some good news for users who have their saved 3.1.2 SHSH Blobs that sn0wbreeze has successfully jailbroken iPhone 3GS new bootrom on iOS 4.0
Update: It was all prediction through analysis but a userland exploit has emerged for iPhone 4 Jailbreak as well as iPhone 3GS iOS 4 New bootrom Jailbreak. It might be released as updated version of Spirit Jailbreak.
Related Articles:
- p0sixninja to release jailbreak iPhone 4 3GS iPod Touch [MC Models New bootrom]
- Update on Jailbreak 4.1 for iPhone 4 3GS and iPod Touch 4G 3G
- Download sn0wbreeze 1.7 to Tether Jailbreak iOS4/4.0 iPhone 3GS New Bootrom iPod Touch 3G 2G MC Models
- GreenPois0n Jailbreak for 4.2/4.1 iPhone 4 3GS iPod Touch 4G 3G ?
{ 30 comments… read them below or add one }
I hope there's a jailbreaking software out soon for iPhone 3GS with new bootrom, since I accidentally upgraded mine to 4.0 and now it is unlockable and I can't go back to 3.1.2 because I didn't save the SHSHs
i did the same thing, this sucks. i wanna use my damn iphone
Yes you can downgrade even to 3.1.3, search and you will find it.
believe us we did search … and no success without shsh saved, if you are able to help then please be so kind, thanks
Cydia saves those for you right? I was able to go back after upgrading to 4.0, I used my MAC, you need to make sure you change the host file also so that your not speaking to apple's server….during the restore process you're going to get an error message saying it couldn't restore the iphone, you will then need an application on your computer called RecBoot to finish restoring to 3.1.2.
me too
same here….accidently updated to 4.0 firmeware on my 3GS . TT
I did that also but was able to go back to 3.1.2 and get my tmobile card back working.
Any word…? still waitin.. =(
so i have a 3gs (mc) and shsh’s on file for 3.1.2/3.1.3 and jailbroken with spirit. if i update to 4.0 i can easaliy go back to 3.1.2 if i want? i want to cheak out the new apple stuff ! or lol should i not bother because it just ain’t worth it? im waiting for the boys to do there sh1t but its killing me lol well mabe not that dramatic but close!! haha
hi lee…can i have shsh's file from you?…because i have the same model but i don't have the shsh file saved.
new to jailbreak….should i update my iphone 3gs new bootrom (MC model) to 4.0 if i wanna jailbreak it in the near future??
You should wait as Apple is expected to release iOS 4.0.1 and then use upcoming Spirit Jailbreak
Good discussion, by the way, when the hardwork for 3GS 4.0 MC Model is expected to finish?
Soon
i have iphone 3gs and i had my phone jailbroke before and it crashed and wouldnt let me restore it so i upgraded to ios 4.0 and i have 05.13.04 modem firmware is there a way to jailbreak my iphone at this point or i’m screwed.
I could NOT jailbreak my iPod Touch 3g, with the latest jailbreaks. I tried all of them. I have a 32 gig MC model. The new jailbreak 4.01 for the iPhone doesn't work for the iPod.
how can i get a jailbreak for 3gs new bootrom but i dont have my shsh blobs cause no one saved them
hey can any one tell me is there any way to jailbreak my iPhone 3gs with ios 4 new bootrom,but i dont have the SHSH file saved…please help..i wanna use my phone.!
:'(
its not possible right now
yes we can do it
I have upgraded my 3gs from 3.1.3 (5.12.1) to ios 4.0.1! Does anyone knows when the jailbreak and unlock will be released? I mean, will it be released this month or next? Because I am considering about giving the phone away..
Maybe u can press shift + restore on itunes and select the 3.1.3 recovery ipsw file. You can download it somewhere if u dont hav it
any idea when the unlock for the 3gs ios 4.0 mc model will be relleass?
Unlock is there but you need to be jailbroken
is anyone able to give me shsh blobs for the iphone 3gs mc133c firmware 5.13 when i bought my phone it was 3.1.3 and id like to downgrade it from 4.0 so i can jailbreak it ..
You can't use SHSH for another phone…you have to have the one specific to your phone, so if you didn't save before you upgraded or before Apple stoped signing them then you screwed…your going to have to wait for Comex to release his JB.
i have iphone 3GS with Version 4.0 and Modem firmware 05.13.04(new bootrom). Can i please know how can i jailbreak my iphone please.
Maybe this week, if your on 4.0 3gs with new boot rom you have to wait for Comex to release…there working out the rest of the bugs.
hi guys can anyone tell me if the iphone 3gs new bootrom never jailbroken before, if its possibile this can be jail broken on the version 4??