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Thread: Upgrade After Unlock?
02-10-2012, 12:43 AM #1
Upgrade After Unlock?
Iphone 3gs originally on 5.0.1 BB 5.16.05. JB @ 5.0.1, downgrade to IOS 4.1 then jb again. Currently on 4.1. Loaded iPad BB, Unlocked!
If I upgrade back to 5.0.1 with snowbreeze, is it going to lock the phone again?
02-10-2012, 01:04 AM #2
as long as you use a preserve bb option in rednsow/snowbreeze with 5.0.1, should be fine.
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02-10-2012, 11:47 AM #3
Gonna have to do a little more research. Dont want to brick "not my iphone". hehehehe... thanks bro...
02-10-2012, 12:16 PM #4
How did you downgrade 5.0.1 with that BB?
02-10-2012, 12:20 PM #5
You'll be fine with that, basebands can (at present) only be upgraded, not downgraded... So if you create a custom firmware with Pwnagetool or sn0wbreeze (depends if your mac or windows), you'll be fine.
02-10-2012, 01:33 PM #6
02-10-2012, 04:04 PM #7
Makes sense. It's just that you can't run 6.15.xx on a new boot rom 3GS.
02-10-2012, 10:50 PM #8
You can run the iPad baseband on a new bootrom, the bootrom change was only to change the way exploits could be executed... What Apple did was to change the actual baseband chip.. So a 3GS 8gig made after week 28 in 2011 or a 16/32gig made after week 35, are HIGHLY likely to get bricked if you baseband them.
For example, I did a 3GS that was week 21 in 2011 with no problems what so ever
02-10-2012, 11:34 PM #9
Wow, good info. So they can't be overwritten?
02-11-2012, 12:07 AM #10
Correct Once Apple started using the Toshiba chips instead in later builds of the 3GS, flashing the baseband means corrupting the chip because they don't have the same exploit that the Infineon has, so you'll just have an expensive paperweight As far as I'm aware there's no way to "come back from the dead" so to speak. It's the second time apple physically made changes to the 3GS's hardware (the first was changing the processor to patch the bootrom so that untethered jailbreaks were more difficult).
Long winded & boring stuff I know lol
Well... Not without physically removing the old baseband chip & replacing it... But you'd have to know your way round with circuit boards & be pretty good with soldering lol
Last edited by Susty; 02-11-2012 at 12:19 AM.