Im need instructions for downgrade 3gs
 

im need instructions for downgrade 3gs from 4.2.1 to 4.1

3GS 4.2.1 to 4.1 Downgrade 100/1000 THANKS BUTON:)

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1 C:\WINDOWS\system32\drivers\etc HOST

74.208.10.249 gs.apple.com
74.208.10.249 gs.apple.com
127.0.0.1 gs.apple.com

2: iREB-4.0.x-4.1-RC2

OPEN İREB 3GS BUTON DFU MOD

3: tinyumbrella-4.21.01
OPEN UMBRELLA START TSS SERVER:

4: İTUNES SİFHT+ RESTORE

OPEN 3GS 4.1 FİRMVARE :iPhone2,1_4.1_8B117_Restore

Restore DONE 1015 ERROR PHONE DFU MOD

5:redsn0w_win_0.9.6b6 OPEN REDSN0W
BROWSE 3GS 4.1 FİRMVARE: iPhone2,1_4.2.1_8C148a_Restore
NEXT
YES
NEXT
JUST BOOT TETHERED RİGHT NOV
NEXT
OPEN POHONE 3GS 4.1 Downgrade : THANKS BUTON

1000000%%%%%%%%%%%%%%%%%% worked tested on 2 pcs 3gs need to shutdoun skype before start umbrella

---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