iphone 4.2.1 downgarde - GSM-Forum

jatjag · 12-08-2010, 08:31

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,

sagar_lse · 12-08-2010, 08:42

me to same problem. some body please help me. if any one tested?

jawad memon · 12-08-2010, 08:58

bro waiting for solution

lahori sher · 12-08-2010, 10:19

download 3gs 4.1 custom file .and change host file 74.208.10.249 gs.apple.com .its 110 % solution to downgrade iphone .

bob42200 · 12-08-2010, 10:27

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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12-08-2010, 08:31	#1 (permalink)
jatjag No Life Poster Join Date: Jun 2004 Age: 51 Posts: 1,258 Member: 69514 Status: Offline Thanks Meter: 66	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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12-08-2010, 08:42	#2 (permalink)
sagar_lse No Life Poster Join Date: May 2008 Location: Bangladesh Posts: 987 Member: 777523 Status: Offline Sonork: 100.1584558 Thanks Meter: 335	me to same problem. some body please help me. if any one tested?

12-08-2010, 08:58	#3 (permalink)
jawad memon Freak Poster Join Date: May 2010 Posts: 224 Member: 1305405 Status: Offline Thanks Meter: 19	bro waiting for solution

12-08-2010, 10:19	#4 (permalink)
lahori sher No Life Poster Join Date: Aug 2010 Location: Lahore Posts: 379 Member: 1374074 Status: Offline Sonork: 100.1591605 Thanks Meter: 92	download 3gs 4.1 custom file .and change host file 74.208.10.249 gs.apple.com .its 110 % solution to downgrade iphone .

12-08-2010, 10:27	#5 (permalink)
bob42200 Banned Join Date: Aug 2007 Age: 47 Posts: 311 Member: 566887 Status: Offline Thanks Meter: 66	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 Report Post Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!Share on FacebookTwitterStumble this Post!