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Old 06-25-2010, 11:21 AM
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Re: [How To] Essential jailbreak/unlock/ssh thread!

the bootrom is a failsafe system designed by apple on the 3GS to inhibit anyone from downgrading their OS. it makes sure you cannot install a firmware lower than your current one, nor a custom firmware. They had an exploit in the old one, but the new one is patched so u cannot downgrade the bootrom nor the OS till they handle the new one
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