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hey ive read what u asked.. about 3GS, my advice is using snowbreeze to do upgrade... at the moment the best is using 4.3.3 as what i am running on my 3gs new bootrom, or just wait for the untethered version of iOS5,it is safe to use custom firmware from snowbreeze if u r using windows, goodluck im giving u private message cause i dont want to hijack that thread where u asked questions