100% downgrade 3gs & 4g to earlier ver
 

I want to share my experience with my dear mates (how to downgrade iphone 3gs) but do all @ ur own risk, I'm not responsible for any thing! Just read everything carefully & do it if u want!!! Important it will not downgrade your modem:eek:Remember if you have saved backup of shsh blobs then you can downgrade in any version as you can see in cydia’s home screen.
But if you don’t have any backup saved then no problem at least you can downgrade from 4.3.1 4.3 to 4.1 old boot or new, no problem just follow up the step by step guide.

You should have
1.tinyumbrella-4.30.05 download it from here http://cache.firmwareumbrella.com/do...la-4.30.05.exe

2. recboot 1.1 download it here RecBoot_v1.1_Win.zip

3. itune 10.2.0.34 download it here Apple - iTunes - Download iTunes Now

4. Greenpois0n RC6 Final version download here http://cache.greenpois0n.com/dl/gp_win_rc6_final.zip

5. Redsn0w 96rc8 download here redsn0w_win_0.9.6rc8.zip - 4shared.com - online file sharing and storage - download
How to :::…

1. connect your iphone 3Gs to pc open tinyumberela click save shsh & wait until it done
2. now you will see in Genral tab iphone 3gs 4.1(9b443 etc) but if you saved already then you can see more ver to downgrade
3. now click one of them eg 4.1 & click “Start Tss Server” button
4. and open itune 10.2.0.34 click restore by pressing shift key point to 4.1 & until you get error 1013 1015 etc. that’s normal no problem
5. now close itune open recboot 1.1 & click exit recovery
6. now you are in emergency mode use any sim card if you have factory unlocked device to activate & unlock or use redsn0w to jailbreak n ultras0w to unlock

for 4g is the same way but you can downgrade to maximum 4.3.1 4.3 to 4.2.1 (if you have not saved shsh already) after error 1015 etc. use gp_win_rc6_final to bring it emergency mode now if you have factory unlocked, unlock n activate it first and if not factory unlocked use redsnow to install cydia use ultrasn0w to unlock

I did many 3gs old boot new boot and 4g too, you can get help any time i'm ready my dear mates

final step thats very important click thank button if you like my post:eek::rolleyes:


regards

thank you very much i've cheked it already on 4g

For Iphone 4 it will not work, you cannot activate using the downgraded firmware cause it will not ask you to activate using the carrier sim. I've tried it many times as it will just fall to 1013 Error. Cause Tinyumbrella is using the Port 80 and it cause itunes to have error in restoring and not allowing users to activate

when you get error 1013 that mean you are succeeded. now close itune and just use greenpoison try again and again you will succeeded i did more then 6 peace of 4g today with this method

there is one trick when you get error 1013 close itune open green poison bring your device in dfu and jailbreak it as quickly as possible (do it even in seconds)

i did many

regards

thank you dear! thats right the way

regards

I tunes stuck on preparing iphone for restore...

bro change pc and then try again

no need to change pc just restart you pc and do again, it happens specially when you are using tinyumberela

regards

thanks bro

good info

thanks help

nice work pls carry on i did 1 3gs today
thank you

I tested myself 3 piece of 3gs and one 4g too. read all and you can do easily

i've tested it on 2 3gs devices yesterday

i have tested in 4g 2.4.1 give error 1013 solved by green poison and now its work fine