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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone 4 / iPhone 4S

iPhone 4 / iPhone 4S iPhone 4 / 4S

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Old 12-08-2010, 07:31   #1 (permalink)
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iphone 4.2.1 downgarde


I have one iphone 3gs.I accidently flashed it with 4.2.1 version.I jailbracked it with redsnow, redsn0w_win_0.9.6b5.But when I restart it it hangs on apple logo .For starting mobile I needs to use redsn0w_win_0.9.6b5 & untethered procedure.It's base band is 05.14 .I didn't upgrade it's baseband.
Is there any procedure to downgrade it back to 4.1?
Please help,
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Old 12-08-2010, 07:42   #2 (permalink)
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me to same problem. some body please help me. if any one tested?
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Old 12-08-2010, 07:58   #3 (permalink)
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bro waiting for solution
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Old 12-08-2010, 09:19   #4 (permalink)
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download 3gs 4.1 custom file .and change host file 74.208.10.249 gs.apple.com .its 110 % solution to downgrade iphone .
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Old 12-08-2010, 09:27   #5 (permalink)
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finaly i get my 3gs worked on full network (nedjma-djeezy-mobilis) whin no thethred iphone

without custom firmwar (oficial frimwar 4.1 and 4.2.1 needed )

firts download RedSn0w 0.9.6 beta 5: Mac – Windows

- download 3GS IOS 4.2.1
- download IOS 4.1

---put ur iphone and restor it to 4.2.1 with itune 10.1 -- turn off ur iphone when done
--- run redsn0w brows 4.2.1 alredy downloaded and tick only ''Install iPad Baseband'' and click nexte ...compelte all steps if ur iphone stuck on appl logo no wory we need only the basband for the unlock

now we hav new baseband but tethered .... don't wory

---now put ur iphone in reocery mode and restor with 4.1 with itune 10.1 ...u got error 1015 nd iphone already in recocery
--- download iREB 4.0.x-4.1-RC2.exe
--- fix recovery boot (no we hav iphone with new basband and no thetred )
--- finaly rerun redsn0w and jailbreak ur ihone with firwar 4.1 don't tick install ''updat ipad basebande''...only ''instal cydia'' ...done

now go to cydia nd instal ultrasnow 1.2

iphonr 3gs model MC frimwar 4.1 with new basband and no thetred
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